plotview

package
v0.1.3 Latest Latest
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 Go to latest Published: May 5, 2024 License: BSD-3-Clause Imports: 36 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	On       bool = true
	Off           = false
	FixMin        = true
	FloatMin      = false
	FixMax        = true
	FloatMax      = false
)

use these for SetColParams args

View Source 
const PlotColumnsHeaderN = 2

Variables

View Source 
var PlotType = types.AddType(&types.Type{Name: "cogentcore.org/core/plot/plotview.Plot", IDName: "plot", Doc: "Plot is a Widget that renders a [plot.Plot] object.\nIf it is not [states.ReadOnly], the user can pan and zoom the graph.\nSee [ConfigPlotToolbar] for a toolbar with panning, selecting, and I/O buttons,\nand PlotView for an interactive interface for selecting columns to view.", Methods: []types.Method{{Name: "SavePlot", Doc: "SaveSVG saves the current Plot to an SVG file", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"filename"}, Returns: []string{"error"}}, {Name: "SavePNG", Doc: "SavePNG saves the current rendered Plot image to an PNG image file.", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"filename"}, Returns: []string{"error"}}}, Embeds: []types.Field{{Name: "WidgetBase"}}, Fields: []types.Field{{Name: "Scale", Doc: "Scale multiplies the plot DPI value, to change the overall scale\nof the rendered plot.  Larger numbers produce larger scaling.\nTypically use larger numbers when generating plots for inclusion in\ndocuments or other cases where the overall plot size will be small."}, {Name: "Plot", Doc: "Plot is the Plot to display in this widget"}}, Instance: &Plot{}})

PlotType is the types.Type for Plot

View Source 
var PlotViewType = types.AddType(&types.Type{Name: "cogentcore.org/core/plot/plotview.PlotView", IDName: "plot-view", Doc: "PlotView is a Cogent Core Widget that provides an interactive 2D plot\nof selected columns of Tabular data, represented by an IndexView into\na table.Table.  Other types of tabular data can be converted into this format.", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Methods: []types.Method{{Name: "SaveSVG", Doc: "SaveSVG saves the plot to an svg -- first updates to ensure that plot is current", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"fname"}}, {Name: "SavePNG", Doc: "SavePNG saves the current plot to a png, capturing current render", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"fname"}}, {Name: "SaveCSV", Doc: "SaveCSV saves the Table data to a csv (comma-separated values) file with headers (any delim)", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"fname", "delim"}}, {Name: "SaveAll", Doc: "SaveAll saves the current plot to a png, svg, and the data to a tsv -- full save\nAny extension is removed and appropriate extensions are added", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"fname"}}, {Name: "OpenCSV", Doc: "OpenCSV opens the Table data from a csv (comma-separated values) file (or any delim)", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"filename", "delim"}}, {Name: "SetColumnsByName", Doc: "SetColumnsByName turns cols On or Off if their name contains given string", Directives: []types.Directive{{Tool: "types", Directive: "add"}}, Args: []string{"nameContains", "on"}}}, Embeds: []types.Field{{Name: "Layout"}}, Fields: []types.Field{{Name: "Table", Doc: "the table of data being plotted"}, {Name: "Params", Doc: "the overall plot parameters"}, {Name: "Columns", Doc: "the parameters for each column of the table"}, {Name: "Plot", Doc: "the plot object"}, {Name: "ConfigPlotFunc", Doc: "ConfigPlotFunc is a function to call to configure [PlotView.Plot], the plot.Plot that\nactually does the plotting. It is called after [Plot] is generated, and properties\nof [Plot] can be modified in it. Properties of [Plot] should not be modified outside\nof this function, as doing so will have no effect."}, {Name: "SVGFile", Doc: "current svg file"}, {Name: "DataFile", Doc: "current csv data file"}, {Name: "InPlot", Doc: "currently doing a plot"}}, Instance: &PlotView{}})

PlotViewType is the types.Type for PlotView

Functions

func MetaMapLower 

func MetaMapLower(meta map[string]string, key string) (string, bool)

MetaMapLower tries meta data access by lower-case version of key too

Types

type ColumnParams 

type ColumnParams struct {

	// whether to plot this column
	On bool

	// name of column we're plotting
	Column string

	// whether to plot lines; uses the overall plot option if unset
	Lines option.Option[bool]

	// whether to plot points with symbols; uses the overall plot option if unset
	Points option.Option[bool]

	// the width of lines; uses the overall plot option if unset
	LineWidth option.Option[float32]

	// the size of points; uses the overall plot option if unset
	PointSize option.Option[float32]

	// the shape used to draw points; uses the overall plot option if unset
	PointShape option.Option[plots.Shapes]

	// effective range of data to plot -- either end can be fixed
	Range minmax.Range32 `view:"inline"`

	// full actual range of data -- only valid if specifically computed
	FullRange minmax.F32 `view:"inline"`

	// color to use when plotting the line / column
	Color color.Color

	// desired number of ticks
	NTicks int

	// if non-empty, this is an alternative label to use in plotting
	Lbl string `label:"Label"`

	// if column has n-dimensional tensor cells in each row, this is the index within each cell to plot -- use -1 to plot *all* indexes as separate lines
	TensorIndex int

	// specifies a column containing error bars for this column
	ErrColumn string

	// if true this is a string column -- plots as labels
	IsString bool `edit:"-"`

	// our plot, for update method
	Plot *PlotView `copier:"-" json:"-" xml:"-" view:"-"`
}

ColumnParams are parameters for plotting one column of data

func (*ColumnParams) CopyFrom 

func (cp *ColumnParams) CopyFrom(fr *ColumnParams)

CopyFrom copies from other col params

func (*ColumnParams) Defaults 

func (cp *ColumnParams) Defaults()

Defaults sets defaults if nil vals present

func (*ColumnParams) FromMetaMap 

func (cp *ColumnParams) FromMetaMap(meta map[string]string)

FromMetaMap sets plot params from meta data map

func (*ColumnParams) Label 

func (cp *ColumnParams) Label() string

func (*ColumnParams) Update 

func (cp *ColumnParams) Update()

Update satisfies the core.Updater interface and will trigger display update on edits

type Plot 

type Plot struct {
	core.WidgetBase

	// Scale multiplies the plot DPI value, to change the overall scale
	// of the rendered plot.  Larger numbers produce larger scaling.
	// Typically use larger numbers when generating plots for inclusion in
	// documents or other cases where the overall plot size will be small.
	Scale float32

	// Plot is the Plot to display in this widget
	Plot *plot.Plot `set:"-"`
}

Plot is a Widget that renders a plot.Plot object. If it is not states.ReadOnly, the user can pan and zoom the graph. See [ConfigPlotToolbar] for a toolbar with panning, selecting, and I/O buttons, and PlotView for an interactive interface for selecting columns to view.

func NewPlot 

func NewPlot(parent tree.Node, name ...string) *Plot

NewPlot adds a new Plot with the given name to the given parent: Plot is a Widget that renders a plot.Plot object. If it is not states.ReadOnly, the user can pan and zoom the graph. See [ConfigPlotToolbar] for a toolbar with panning, selecting, and I/O buttons, and PlotView for an interactive interface for selecting columns to view.

func (*Plot) HandleEvents 

func (pt *Plot) HandleEvents()

func (*Plot) New 

func (t *Plot) New() tree.Node

New returns a new *Plot value

func (*Plot) NodeType 

func (t *Plot) NodeType() *types.Type

NodeType returns the *types.Type of Plot

func (*Plot) OnInit 

func (pt *Plot) OnInit()

func (*Plot) Render 

func (pt *Plot) Render()

func (*Plot) SavePNG 

func (pt *Plot) SavePNG(filename core.Filename) error

SavePNG saves the current rendered Plot image to an PNG image file.

func (*Plot) SavePlot 

func (pt *Plot) SavePlot(filename core.Filename) error

SaveSVG saves the current Plot to an SVG file

func (*Plot) SetPlot 

func (pt *Plot) SetPlot(pl *plot.Plot)

SetPlot sets the plot to given Plot, and calls UpdatePlot to ensure it is drawn at the current size of this widget

func (*Plot) SetScale 

func (t *Plot) SetScale(v float32) *Plot

SetScale sets the [Plot.Scale]: Scale multiplies the plot DPI value, to change the overall scale of the rendered plot. Larger numbers produce larger scaling. Typically use larger numbers when generating plots for inclusion in documents or other cases where the overall plot size will be small.

func (*Plot) SetStyles 

func (pt *Plot) SetStyles()

func (*Plot) SetTooltip 

func (t *Plot) SetTooltip(v string) *Plot

SetTooltip sets the [Plot.Tooltip]

func (*Plot) SizeFinal 

func (pt *Plot) SizeFinal()

func (*Plot) UpdatePlot 

func (pt *Plot) UpdatePlot()

UpdatePlot draws the current plot at the size of the current widget, and triggers a Render so the widget will be rendered.

func (*Plot) WidgetTooltip 

func (pt *Plot) WidgetTooltip(pos image.Point) (string, image.Point)

type PlotParams 

type PlotParams struct {

	// optional title at top of plot
	Title string

	// type of plot to generate.  For a Bar plot, items are plotted ordinally by row and the XAxis is optional
	Type PlotTypes

	// whether to plot lines
	Lines bool `default:"true"`

	// whether to plot points with symbols
	Points bool

	// width of lines
	LineWidth float32 `default:"1"`

	// size of points
	PointSize float32 `default:"3"`

	// the shape used to draw points
	PointShape plots.Shapes

	// width of bars for bar plot, as fraction of available space (1 = no gaps)
	BarWidth float32 `min:"0.01" max:"1" default:"0.8"`

	// if true, draw lines that connect points with a negative X-axis direction;
	// otherwise there is a break in the line.
	// default is false, so that repeated series of data across the X axis
	// are plotted separately.
	NegativeXDraw bool

	// Scale multiplies the plot DPI value, to change the overall scale
	// of the rendered plot.  Larger numbers produce larger scaling.
	// Typically use larger numbers when generating plots for inclusion in
	// documents or other cases where the overall plot size will be small.
	Scale float32 `default:"1,2"`

	// what column to use for the common X axis. if empty or not found,
	// the row number is used.  This optional for Bar plots, if present and
	// LegendColumn is also present, then an extra space will be put between X values.
	XAxisColumn string

	// optional column for adding a separate colored / styled line or bar
	// according to this value, and acts just like a separate Y variable,
	// crossed with Y variables.
	LegendColumn string

	// position of the Legend
	LegendPosition plot.LegendPosition `view:"inline"`

	// rotation of the X Axis labels, in degrees
	XAxisRotation float32

	// optional label to use for XAxis instead of column name
	XAxisLabel string

	// optional label to use for YAxis -- if empty, first column name is used
	YAxisLabel string

	// our plot, for update method
	Plot *PlotView `copier:"-" json:"-" xml:"-" view:"-"`
}

PlotParams are parameters for overall plot

func (*PlotParams) CopyFrom 

func (pp *PlotParams) CopyFrom(fr *PlotParams)

CopyFrom copies from other col params

func (*PlotParams) Defaults 

func (pp *PlotParams) Defaults()

Defaults sets defaults if nil vals present

func (*PlotParams) FromMeta 

func (pp *PlotParams) FromMeta(dt *table.Table)

FromMeta sets plot params from meta data

func (*PlotParams) FromMetaMap 

func (pp *PlotParams) FromMetaMap(meta map[string]string)

FromMetaMap sets plot params from meta data map

func (*PlotParams) Update 

func (pp *PlotParams) Update()

Update satisfies the core.Updater interface and will trigger display update on edits

type PlotTypes 

type PlotTypes int32 //enums:enum

PlotTypes are different types of plots 

const (
	// XY is a standard line / point plot
	XY PlotTypes = iota

	// Bar plots vertical bars
	Bar
)
const PlotTypesN PlotTypes = 2

PlotTypesN is the highest valid value for type PlotTypes, plus one.

func PlotTypesValues 

func PlotTypesValues() []PlotTypes

PlotTypesValues returns all possible values for the type PlotTypes.

func (PlotTypes) Desc 

func (i PlotTypes) Desc() string

Desc returns the description of the PlotTypes value.

func (PlotTypes) Int64 

func (i PlotTypes) Int64() int64

Int64 returns the PlotTypes value as an int64.

func (PlotTypes) MarshalText 

func (i PlotTypes) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*PlotTypes) SetInt64 

func (i *PlotTypes) SetInt64(in int64)

SetInt64 sets the PlotTypes value from an int64.

func (*PlotTypes) SetString 

func (i *PlotTypes) SetString(s string) error

SetString sets the PlotTypes value from its string representation, and returns an error if the string is invalid.

func (PlotTypes) String 

func (i PlotTypes) String() string

String returns the string representation of this PlotTypes value.

func (*PlotTypes) UnmarshalText 

func (i *PlotTypes) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

func (PlotTypes) Values 

func (i PlotTypes) Values() []enums.Enum

Values returns all possible values for the type PlotTypes.

type PlotView 

type PlotView struct {
	core.Layout

	// the table of data being plotted
	Table *table.IndexView `set:"-"`

	// the overall plot parameters
	Params PlotParams

	// the parameters for each column of the table
	Columns []*ColumnParams `set:"-"`

	// the plot object
	Plot *plot.Plot `set:"-" edit:"-" json:"-" xml:"-"`

	// ConfigPlotFunc is a function to call to configure [PlotView.Plot], the plot.Plot that
	// actually does the plotting. It is called after [Plot] is generated, and properties
	// of [Plot] can be modified in it. Properties of [Plot] should not be modified outside
	// of this function, as doing so will have no effect.
	ConfigPlotFunc func() `json:"-" xml:"-"`

	// current svg file
	SVGFile core.Filename

	// current csv data file
	DataFile core.Filename

	// currently doing a plot
	InPlot bool `set:"-" edit:"-" json:"-" xml:"-"`
}

PlotView is a Cogent Core Widget that provides an interactive 2D plot of selected columns of Tabular data, represented by an IndexView into a table.Table. Other types of tabular data can be converted into this format.

func NewPlotView 

func NewPlotView(parent tree.Node, name ...string) *PlotView

NewPlotView adds a new PlotView with the given name to the given parent: PlotView is a Cogent Core Widget that provides an interactive 2D plot of selected columns of Tabular data, represented by an IndexView into a table.Table. Other types of tabular data can be converted into this format.

func NewSubPlot 

func NewSubPlot(par core.Widget, name ...string) *PlotView

NewSubPlot returns a PlotView with its own separate Toolbar, suitable for a tab or other element that is not the main plot.

func (*PlotView) ColParamsTry 

func (pl *PlotView) ColParamsTry(colNm string) (*ColumnParams, error)

ColParamsTry returns the current column parameters by name (to access by index, just use Columns directly) Try version returns error message if not found.

func (*PlotView) ColumnParams 

func (pl *PlotView) ColumnParams(colNm string) *ColumnParams

ColParams returns the current column parameters by name (to access by index, just use Columns directly) returns nil if not found

func (*PlotView) ColumnsConfig 

func (pl *PlotView) ColumnsConfig()

ColumnsConfig configures the column gui buttons

func (*PlotView) ColumnsFromMetaMap 

func (pl *PlotView) ColumnsFromMetaMap(meta map[string]string)

ColumnsFromMetaMap updates all the column settings from given meta map

func (*PlotView) ColumnsLay 

func (pl *PlotView) ColumnsLay() *core.Frame

func (*PlotView) ColumnsListUpdate 

func (pl *PlotView) ColumnsListUpdate()

ColumnsListUpdate updates the list of columns

func (*PlotView) ColumnsUpdate 

func (pl *PlotView) ColumnsUpdate()

ColumnsUpdate updates the display toggles for all the cols

func (*PlotView) Config 

func (pl *PlotView) Config()

func (*PlotView) ConfigPlot 

func (pl *PlotView) ConfigPlot(plt *plot.Plot)

ConfigPlot configures the plot with params

func (*PlotView) ConfigPlotView 

func (pl *PlotView) ConfigPlotView()

ConfigPlotView configures the overall view widget

func (*PlotView) ConfigToolbar 

func (pl *PlotView) ConfigToolbar(tb *core.Toolbar)

func (*PlotView) CopyFieldsFrom 

func (pl *PlotView) CopyFieldsFrom(frm tree.Node)

func (*PlotView) DeleteColumns 

func (pl *PlotView) DeleteColumns()

DeleteColumns deletes any existing cols, to ensure an update to new table

func (*PlotView) GenPlot 

func (pl *PlotView) GenPlot()

GenPlot generates the plot and renders it to SVG It surrounds operation with InPlot true / false to prevent multiple updates

func (*PlotView) GenPlotBar 

func (pl *PlotView) GenPlotBar()

GenPlotBar generates a Bar plot, setting GPlot variable

func (*PlotView) GenPlotXY 

func (pl *PlotView) GenPlotXY()

GenPlotXY generates an XY (lines, points) plot, setting Plot variable

func (*PlotView) GoUpdatePlot 

func (pl *PlotView) GoUpdatePlot()

GoUpdatePlot updates the display based on current IndexView into table. this version can be called from go routines.

func (*PlotView) New 

func (t *PlotView) New() tree.Node

New returns a new *PlotView value

func (*PlotView) NodeType 

func (t *PlotView) NodeType() *types.Type

NodeType returns the *types.Type of PlotView

func (*PlotView) OnAdd 

func (pl *PlotView) OnAdd()

func (*PlotView) OnInit 

func (pl *PlotView) OnInit()

func (*PlotView) OpenCSV 

func (pl *PlotView) OpenCSV(filename core.Filename, delim table.Delims)

OpenCSV opens the Table data from a csv (comma-separated values) file (or any delim)

func (*PlotView) OpenFS 

func (pl *PlotView) OpenFS(fsys fs.FS, filename core.Filename, delim table.Delims)

OpenFS opens the Table data from a csv (comma-separated values) file (or any delim) from the given filesystem.

func (*PlotView) PlotChild 

func (pl *PlotView) PlotChild() *Plot

func (*PlotView) PlotXAxis 

func (pl *PlotView) PlotXAxis(plt *plot.Plot, ixvw *table.IndexView) (xi int, xview *table.IndexView, err error)

PlotXAxis processes the XAxis and returns its index

func (*PlotView) SaveAll 

func (pl *PlotView) SaveAll(fname core.Filename)

SaveAll saves the current plot to a png, svg, and the data to a tsv -- full save Any extension is removed and appropriate extensions are added

func (*PlotView) SaveCSV 

func (pl *PlotView) SaveCSV(fname core.Filename, delim table.Delims)

SaveCSV saves the Table data to a csv (comma-separated values) file with headers (any delim)

func (*PlotView) SavePNG 

func (pl *PlotView) SavePNG(fname core.Filename)

SavePNG saves the current plot to a png, capturing current render

func (*PlotView) SaveSVG 

func (pl *PlotView) SaveSVG(fname core.Filename)

SaveSVG saves the plot to an svg -- first updates to ensure that plot is current

func (*PlotView) SetAllColumns 

func (pl *PlotView) SetAllColumns(on bool)

SetAllColumns turns all Columns on or off (except X axis)

func (*PlotView) SetColParams 

func (pl *PlotView) SetColParams(colNm string, on bool, fixMin bool, min float32, fixMax bool, max float32) *ColumnParams

SetColParams sets main parameters for one column

func (*PlotView) SetColumnsByName 

func (pl *PlotView) SetColumnsByName(nameContains string, on bool)

SetColumnsByName turns cols On or Off if their name contains given string

func (*PlotView) SetConfigPlotFunc 

func (t *PlotView) SetConfigPlotFunc(v func()) *PlotView

SetConfigPlotFunc sets the [PlotView.ConfigPlotFunc]: ConfigPlotFunc is a function to call to configure [PlotView.Plot], the plot.Plot that actually does the plotting. It is called after Plot is generated, and properties of Plot can be modified in it. Properties of Plot should not be modified outside of this function, as doing so will have no effect.

func (*PlotView) SetDataFile 

func (t *PlotView) SetDataFile(v core.Filename) *PlotView

SetDataFile sets the [PlotView.DataFile]: current csv data file

func (*PlotView) SetParams 

func (t *PlotView) SetParams(v PlotParams) *PlotView

SetParams sets the [PlotView.Params]: the overall plot parameters

func (*PlotView) SetSVGFile 

func (t *PlotView) SetSVGFile(v core.Filename) *PlotView

SetSVGFile sets the [PlotView.SVGFile]: current svg file

func (*PlotView) SetTable 

func (pl *PlotView) SetTable(tab *table.Table) *PlotView

SetTable sets the table to view and does Update to update the Column list, which will also trigger a Layout and updating of the plot on next render pass. This is safe to call from a different goroutine.

func (*PlotView) SetTableView 

func (pl *PlotView) SetTableView(tab *table.IndexView) *PlotView

SetTableView sets the table to view and does Update to update the Column list, which will also trigger a Layout and updating of the plot on next render pass. This is safe to call from a different goroutine.

func (*PlotView) SetTooltip 

func (t *PlotView) SetTooltip(v string) *PlotView

SetTooltip sets the [PlotView.Tooltip]

func (*PlotView) SizeFinal 

func (pt *PlotView) SizeFinal()

func (*PlotView) UpdatePlot 

func (pl *PlotView) UpdatePlot()

UpdatePlot updates the display based on current IndexView into table. This version can only be called within main goroutine for window eventloop -- use GoUpdateUplot for other-goroutine updates.

func (*PlotView) XLabel 

func (pl *PlotView) XLabel() string

XLabel returns the X-axis label

func (*PlotView) YLabel 

func (pl *PlotView) YLabel() string

YLabel returns the Y-axis label

type TableXY 

type TableXY struct {

	// the index view of data table to plot from
	Table *table.IndexView

	// the indexes of the tensor columns to use for the X and Y data, respectively
	XColumn, YColumn int

	// numer of elements in each row of data -- 1 for scalar, > 1 for multi-dimensional
	XRowSz, YRowSz int

	// the indexes of the element within each tensor cell if cells are n-dimensional, respectively
	XIndex, YIndex int

	// the column to use for returning a label using Label interface -- for string cols
	LabelColumn int

	// the column to use for returning errorbars (+/- given value) -- if YColumn is tensor then this must also be a tensor and given YIndex used
	ErrColumn int

	// range constraints on Y values
	YRange minmax.Range32
}

TableXY selects two columns from a table.Table data table to plot in a gonum plot, satisfying the plot/plots.XYer and .Valuer interfaces (for bar charts). For Tensor-valued cells, Index's specify tensor cell. Also satisfies the plot/plots.Labeler interface for labels attached to a line, and plot/plots.YErrorer for error bars.

func NewTableXY 

func NewTableXY(dt *table.IndexView, xcol, xtsrIndex, ycol, ytsrIndex int, yrng minmax.Range32) (*TableXY, error)

NewTableXY returns a new XY plot view onto the given IndexView of table.Table (makes a copy), from given column indexes, and tensor indexes within each cell. Column indexes are enforced to be valid, with an error message if they are not.

func NewTableXYName 

func NewTableXYName(dt *table.IndexView, xi, xtsrIndex int, ycol string, ytsrIndex int, yrng minmax.Range32) (*TableXY, error)

NewTableXYName returns a new XY plot view onto the given IndexView of table.Table (makes a copy), from given column name and tensor indexes within each cell. Column indexes are enforced to be valid, with an error message if they are not.

func (*TableXY) FilterValues 

func (txy *TableXY) FilterValues()

FilterValues removes items with NaN values, and out of Y range

func (*TableXY) Label 

func (txy *TableXY) Label(row int) string

Label returns a label for given row in table, using plot/plots.Labeler interface

func (*TableXY) Len 

func (txy *TableXY) Len() int

Len returns the number of rows in the view of table

func (*TableXY) TRowValue 

func (txy *TableXY) TRowValue(row int) float32

TRowValue returns the y value at given true table row in table view

func (*TableXY) TRowXValue 

func (txy *TableXY) TRowXValue(row int) float32

TRowXValue returns an x value at given actual row in table

func (*TableXY) Validate 

func (txy *TableXY) Validate() error

Validate returns error message if column indexes are invalid, else nil it also sets column indexes to 0 so nothing crashes.

func (*TableXY) Value 

func (txy *TableXY) Value(row int) float32

Value returns the y value at given row in table view

func (*TableXY) XValue 

func (txy *TableXY) XValue(row int) float32

XValue returns an x value at given row in table view

func (*TableXY) XY 

func (txy *TableXY) XY(row int) (x, y float32)

XY returns an x, y pair at given row in table

func (*TableXY) YError 

func (txy *TableXY) YError(row int) (float32, float32)

YError returns a error bars using plot/plots.YErrorer interface

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