MATLAB: Does “pcolor” not display grid lines or ticks

gridMATLABpcolor

I have created the following figure with "pcolor", but grid lines or ticks do not show up. How do I get them to display?

x=-2:0.1:2;
y=-2:0.1:2;
vals=rand(41);
p=pcolor(x,y,vals)
set(p,'EdgeColor','none')
grid on

Best Answer

The grid is being drawn in the background layer of the figure. The colors in this figure are covering up the grid line.

You can bring the grid to the top layer by adding the following command right after the "grid on" command:

set(gca,'layer','top')

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MATLAB: Is it possible to bring “grid on” to the front of a figure

By default, all plotted objects are rendered on top of the axis (including axis lines, grid lines, etc). You can reverse that by modifying the layer property:

set(gca, 'layer', 'top');

MATLAB: Highlighting a portion of an image created from a matrix using “pcolor”

You can use rectangle() to draw on the display.
You can use the Computer Vision function insertShape() to write into an array (probably displaying the array later)
You can use assignment statements to write into an array (probably displaying the array later)

xloc = 65:95;
yloc = 65:100;
YourArray(yloc, xloc([1 end]), :) = 255;   %left and right edges
YourArray(yloc([1 end]), xloc, :) = 255;   %top and bottom edges

Best Answer

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MATLAB: Is it possible to bring “grid on” to the front of a figure

MATLAB: Highlighting a portion of an image created from a matrix using “pcolor”

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