Replacing zeros with ones in a 3D array & accessing all 2D arrays of the 3d array diagonally from bottom centre to the top of 2d arrays

Hello there,

I have a large 3d array and I would like to replace all zeros values by other constant values. Could you advise how to perform this?

Also, I would like to access all elements of the 2d array of my 3d array starting from the bottom centre and then go diagonally to the top of the 2d arrays, then, jump to the upper row from the bottom centre of all 2d arrays and perform the same thing.

Could you also advise on how to perform this in Matlab?

Thanks in advance, MT

[Stephen23]

Can you please provide us with both input and output examples: a small 3D array and the desired output from this array.

[MT]

Please see attached.

Thanks in advance for your time.

Answer 1

[Walter Roberson]

YourArray(YourArray == 0) = The_Constant;

If the constant is greater the value you are replacing and there are no values less than the constant in the array, then you can use

YourArray = max(YourArray, The_Constant);

[MT]

Thanks Walter and so much appreciated for your answer, which solves the first part of the question.

Any suggestions for the second part of the question? Please see attached for more information about the second part of my question.