# ChartMatrix

VTKExamples/Cxx/Plotting/ChartMatrix

### Description¶

This example illustrates the use vtkChartMatrix, a container that holds a matrix of charts. The example creates a 2 x 2 matrix of plots. The matrix elements are:

(0,0): a vtkPlotPoints (0,1): a vtkPlotPoints (1,0): a vtkPlotLine (1,1): a vtkPlotBar and a vtkPlotPoints

Question

### Code¶

ChartMatrix.cxx

#include <vtkNew.h>
#include <vtkChartMatrix.h>
#include <vtkChartXY.h>

#include <vtkNamedColors.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkPlot.h>
#include <vtkPlotPoints.h>
#include <vtkAxis.h>
#include <vtkPen.h>
#include <vtkTable.h>
#include <vtkFloatArray.h>
#include <vtkContextView.h>
#include <vtkContextScene.h>
#include <vtkRenderWindowInteractor.h>

//----------------------------------------------------------------------------
int main( int, char * [] )
{
vtkNew<vtkNamedColors> colors;

// Set up a 2D scene, add an XY chart to it
vtkNew<vtkContextView> view;
view->GetRenderWindow()->SetSize(1280, 1024);

vtkNew<vtkChartMatrix> matrix;
matrix->SetSize(vtkVector2i(2, 2));
matrix->SetGutter(vtkVector2f(30.0, 30.0));

// Create a table with some points in it...
vtkNew<vtkTable> table;
vtkNew<vtkFloatArray> arrX;

arrX->SetName("X Axis");

vtkNew<vtkFloatArray> arrC;
arrC->SetName("Cosine");

vtkNew<vtkFloatArray> arrS;
arrS->SetName("Sine");

vtkNew<vtkFloatArray> arrS2;
arrS2->SetName("Sine2");

vtkNew<vtkFloatArray> tangent;
tangent->SetName("Tangent");

int numPoints = 42;
float inc = 7.5 / (numPoints-1);
table->SetNumberOfRows(numPoints);
for (int i = 0; i < numPoints; ++i)
{
table->SetValue(i, 0, i * inc);
table->SetValue(i, 1, cos(i * inc));
table->SetValue(i, 2, sin(i * inc));
table->SetValue(i, 3, sin(i * inc) + 0.5);
table->SetValue(i, 4, tan(i * inc));
}

// Add multiple line plots, setting the colors etc
// lower left plot, a point chart
vtkChart *chart = matrix->GetChart(vtkVector2i(0, 0));
plot->SetInputData(table, 0, 1);
dynamic_cast<vtkPlotPoints*>(plot)->SetMarkerStyle(vtkPlotPoints::DIAMOND);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
colors->GetColor3ub("sea_green").GetRed(),
colors->GetColor3ub("sea_green").GetGreen(),
colors->GetColor3ub("sea_green").GetBlue(),
255);

// upper left plot, a point chart
chart = matrix->GetChart(vtkVector2i(0, 1));
plot->SetInputData(table, 0, 2);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
255);

//
chart = matrix->GetChart(vtkVector2i(1, 0));
plot->SetInputData(table, 0, 3);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
colors->GetColor3ub("dark_orange").GetRed(),
colors->GetColor3ub("dark_orange").GetGreen(),
colors->GetColor3ub("dark_orange").GetBlue(),
255);

// upper right plot, a bar and point chart
chart = matrix->GetChart(vtkVector2i(1, 1));
plot->SetInputData(table, 0, 4);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
colors->GetColor3ub("burnt_sienna").GetRed(),
colors->GetColor3ub("burnt_sienna").GetGreen(),
colors->GetColor3ub("burnt_sienna").GetBlue(),
255);

plot->SetInputData(table, 0, 1);
dynamic_cast<vtkPlotPoints*>(plot)->SetMarkerStyle(vtkPlotPoints::CROSS);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
255);

// Lower right plot, a line chart

chart = matrix->GetChart(vtkVector2i(1, 0));
plot->SetInputData(table, 0, 3);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
colors->GetColor3ub("dark_orange").GetRed(),
colors->GetColor3ub("dark_orange").GetGreen(),
colors->GetColor3ub("dark_orange").GetBlue(),
255);

plot->SetInputData(table, 0, 3);
plot->GetXAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->GetYAxis()->GetGridPen()->SetColorF(colors->GetColor3d("warm_grey").GetData());
plot->SetColor(
colors->GetColor3ub("royal_blue").GetRed(),
colors->GetColor3ub("royal_blue").GetGreen(),
colors->GetColor3ub("royal_blue").GetBlue(),
255);

// Finally render the scene and compare the image to a reference image
view->GetRenderer()->SetBackground(colors->GetColor3d("navajo_white").GetData());
view->GetRenderWindow()->Render();
view->GetInteractor()->Initialize();
view->GetInteractor()->Start();
return EXIT_SUCCESS;
}


### CMakeLists.txt¶

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ChartMatrix)

find_package(VTK COMPONENTS
vtkChartsCore
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkInteractionStyle
vtkRenderingContext2D
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
vtkViewsContext2D QUIET)
if (NOT VTK_FOUND)
message("Skipping ChartMatrix: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION:${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
# old system
include(${VTK_USE_FILE}) add_executable(ChartMatrix MACOSX_BUNDLE ChartMatrix.cxx ) target_link_libraries(ChartMatrix PRIVATE${VTK_LIBRARIES})
else ()
# include all components
target_link_libraries(ChartMatrix PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ChartMatrix MODULES${VTK_LIBRARIES}
)
endif ()


cd ChartMatrix/build


If VTK is installed:

cmake ..


If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..


Build the project:

make


and run it:

./ChartMatrix


WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.