Use the Matrix Histogram plot in 2D () when you have a precomputed matrix that you want to visualize as a 2D histogram. For example, in a fatigue analysis, you can use it for rainflow counting to be able to visualize how the stress amplitudes and mean stresses are distributed. Using this plot can then help to see how the actual damage is distributed between the different stress levels. If a large fraction of the total damage is caused by loads that occur only a few times, the statistical sample of the loads can be too small to reach any good conclusions. Add Filter, Height Expression, and Transparency (only when Height Expression is used) subnodes if required.

Click the Replace Expression button () to select the matrix variable to use as input for the matrix histogram. The matrix histogram plot uses precomputed matrix variables only.

From the Unit list, select any applicable unit for the histogram plot. Select the Description check box to customize or enter a description of the plot.

From the Unit list, select an applicable unit for the x- and y-axis of the histogram. The matrix contains data points in the xy-plane, where the x- and y-values are stresses. This means that the x- and y-values can have any pressure unit (pascal, for example). By changing the axis’ unit, you choose how to interpret the x- and y-axis in the plot.