Highlighting a portion of an image created from a matrix using "pcolor"

I have created an image to visualize a matrix I have using pcolor function. The plot is shown below. I want to highlight elements of the matrix located in the range [65 95] using a square frame or anything else. I have created a square around this area manually but it is not perfect. Any idea?

Thanks

Answer 1

[Walter Roberson]

• 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

[Ismaeel]

Thank you so much Walter Roberson; The code you attached works perfectly, and the result is ploted below.

Would it be okey if I ask another related question? How can I label the axes individually or in groups on both axes?

Thank you

[Walter Roberson]

xlabel('x'); ylabel('y')

When you start talking about labeling in groups, I wonder if you are talking about the tick labels ?

[Ismaeel]

So, the matrix I have is of [176 176] dimension.I wanted to label both axes with their corresponding row and column number; that is, from 1 to 176 on both axes. Or, if the labels are so dense and can't be read, I wonder if I can divide the labels into groups.

[Ismaeel]

Thanks Walter Roberson once again; I have solved the legend problem using the "xticks, xticklabels, xtickangle" functions you referred to.