Histogram
Create a histogram plot for 1D and 2D plot groups.
Syntax
model.result(<pgtag>).create(<ftag>,"Histogram");
model.result(<pgtag>).feature(<ftag>).set(property, <value>);
model.result(<pgtag>).feature(<ftag>).run();
Description
model.result(<pgtag>).create(<ftag>,"Histogram") creates a histogram plot feature named <ftag> belonging to the plot group <pgtag>.
Histograms are used to visualize the distribution of the range of an expression. The result is a plot with the expression’s range on the x-axis and element length, area, or volume on the y-axis. Such histogram plots can be added to 1D plot groups. In 2D histograms, which you can add to 2D plot groups, the x-axis and y-axis represent the values of two quantities (as a number of bins or a range of values), and the color surface represents the count of the total element volume in each “bin”.
The following properties are available:
Table 7-48: Valid Property/Value Pairs for Histogram Plots
name
Value
Default
Description
const
String array of property/value pairs
Empty
Parameters to use in the expressions.
cumulative
Boolean
false
Plot a cumulative histogram.
customlinecolor
RGB-triplet
{0,0,1} or last used edgecolor.
The color to use for the lines. Active when linecolor is set to custom.
data
none | parent | dataset name
parent
The dataset this feature refers to.
descr
String
Model-dependent.
The description of the expression in expr. Is used in the automatic title.
descriptionintitle
on | off
on
Whether the title contribution should contain the description when titletype is custom.
differential
on | off
on
Whether the expression should be linearized at the linearization point. Applicable only if evalmethod is harmonic.
evalmethod
linpoint | harmonic | lintotal | lintotalavg | lintotalrms | lintotalpeak
harmonic
Applicable only for solutions with a stored linearization point. Controls if the linearization point, the perturbation, or a combination should be used when evaluating the expression.
expr
String
Model-dependent.
The expression to plot.
expressionintitle
on | off
off
Whether the title contribution should contain the expression when titletype is custom.
function
continuous | discrete
continuous
Use a continuous function or a discrete function (that is, using a constant level in each bin) for the histogram.
innerinput
all | first | last | manual | manualindices | interp
all
How to input the solution to use. manual indicates that solnum is used. manualindices indicates that solnumindices is used. interp indicates that t is used.
interp
double row matrix
Empty on all levels.
The times to use, for transient levels. Available when data is not parent and the underlying data is transient.
level
fromdataset | volume | surface | line | point
fromdataset
The geometry level to evaluate on.
limits
double array
0 1
The bin limits if method is limits.
linecolor
custom | cycle | black | blue | cyan | gray | green | magenta | red | white | yellow
cycle
How to color the lines in the graph. Cycle indicates that the colors is different for each line.
linewidth
double
0.5
The line width.
linemarker
none | cycle | asterisk | circle | diamond | plus | point | square | star | triangle
none
The line markers, if any. Cycle indicates that the marker is different for each line.
linestyle
none | cycle | solid | dotted | dashed | dashdot
solid
The line style, if any. Cycle indicates that the line style is different for each line.
looplevel
integer row matrix
All solutions on all levels
The solutions to use, per level.
looplevelindices
integer row matrix
Empty
An alternative way to specify the solutions to use, allowing you to enter, for example, range(1,1,20). Applicable when looplevelinput is manualindices on a level.
looplevelinput
String array with all | first | last | manual | manualindices | interp on each level
all on all levels
How to input the solution to use, per level. manual on a level indicates that looplevel is used on that level. manualindices on a level indicates that looplevelindices is used on that level. interp on a level indicates that interp is used on that level.
markerpos
interp | datapoints
interp
Controls whether the positions of the markers are in the data points of the plot, or interpolated depending on the number (set in markers). Markers are visible when linemarker is set.
markers
integer
8
The number of markers to show. Markers are visible when linemarker is set.
measure
auto | integral | count
auto
The measure for evaluation of the histogram data. Choose integral for volume-based data; choose count of element-based data. auto is count for Mesh datasets; integral otherwise.
method
limit | number
number
The method used to specify the bins in which the expression’s range is split
normalization
integralsum | integralscaled| none | peak
none
The normalization of the values plot on the y-axis.
number
nonnegative integer
10
The number of bins if method is number.
outerinput
all | first | last | manual | manualindices
all
How to input the outer solutions to use. Applicable only for parametric sweep models. manual indicates that outersolnum is used. manualindices indicates that outersolnumindices is used.
outersolnum
nonnegative integer array
1
The index of the outer solutions to use. Applicable only for parametric sweep models. Since the various outer solutions can have different number of solnum, the solnum property is not used.
outersolnumindices
String or integer array
Empty
An alternative way to specify the outer solutions to use, allowing you to enter, for example, range(1,1,20). Applicable when outerinput is manualindices.
plotonsecyaxis
Boolean
true
Plot on secondary y-axis, if twoyaxes is set to true in the parent plot group for 1D histogram plots.
prefixintitle
String
Empty
Added prefix to contribution to title
rangecoloractive
on | off
off
Whether to use the manual color range specified in rangecolormin and rangecolormax. The color range specifies the minimum and maxim value in the plotted colors. Default is the minimum and maximum data values. This and other range settings are available for 2D Histogram plots.
rangecolormax
double
Plot-dependent
The maximum color range value. Active when rangecoloractive is on.
rangecolormin
double
Plot-dependent
The minimum color range value. Active when rangecoloractive is on.
rangedatactive
on | off
off
Whether to use the manual data range specified in rangedatamin and rangedatamax. Values outside the data range is not plotted.
rangedatamax
double
Plot-dependent
The maximum data value. Active when rangedataactive is on.
rangedatamin
double
Plot-dependent
The minimum data value. Active when rangedataactive is on.
refine
nonnegative integer
1
The element refinement to use, if resolution is set to manual. Bear in mind that this is the refinement used for the base dataset, so the number of elements in the model can increase radically if the plot uses, for example, a revolve dataset.
resolution
norefine | coarse | normal | fine | finer | extrafine | custom
normal
Controls the plot’s resolution. A finer setting results in a higher resolution by modifying the internally computed default refinement. Use custom to enter your own refinement in the refine property.
sdim
fromdataset | 0 | 1 | 2 | 3
fromdataset
The space dimension to evaluate the underlying dataset in
solnum
integer array
All solutions
The solutions to plot. Available when data is not parent and the underlying data has multiple solutions
solnumindices
String or integer array
Empty
An alternative way to specify the solutions to use, allowing you to enter, for example, range(1,1,20). Applicable when innerinput is manualindices.
solrepresentation
solnum | solutioninfo
solutioninfo
Indicates which method of selecting solutions is active
solutionparams
manual | parent
manual
If data is a local dataset with nontrivial data, specify solutions manually or take them from the parent plot group.
suffixintitle
String
Empty
Added suffix to contribution to title
t
double array
Empty
The times to plot. Available when data is not parent and the underlying solution is transient.
title
String
The auto-title.
The title to use when titletype is manual.
titletype
auto | custom | label | manual | none
auto
auto, if the title should be computed automatically. custom, if the title should be computed automatically, but customized. label, if the title should be the plot group’s label. manual, if the manual title should be used (the title property). none, if no title should be displayed.
type
curve | solid
curve
Use a filled histogram (solid) or a histogram drawn using lines (curve). This property is only available when function is discrete.
typeintitle
on | off
on
Whether the title contribution should contain the type when titletype is custom.
unit
String
Model-dependent
The unit to use for the expression in expr. If the old unit is not valid when the expression changes, the unit property is reset to default.
unitintitle
on | off
on
Whether the title contribution should contain the unit when titletype is custom.
Attributes
Filter (Plot Attribute); Height, AberrationHeight, HistogramHeight, TableHeight (2D only); Transparency (if a height attribute is used)
Compatibility
The normalization property integral in previous versions of COMSOL Multiphysics has been replaced by integralsum in version 5.5.
See Also
TableHistogram, MatrixHistogram