Different values in matrix and in the plot of image

Hello everybody,

I have a matrix A with double precision, 198*198 of size.Ploting the image using imshow(A,[]) and search using the Data cursor the value for the voxel (90,90) I get a value x, which is expected. However, using the command window to obtain the same value A(90,90) the value that I obtain is completely different of x. Can somebody explain why this happens and how can I get the value x in the command window?

Thank you in advance, Joaquim

[Adam]

Are you sure this happens with (90,90) specifically?

You have to be careful with X,Y and rows, columns when indexing into a matrix. To get the value reported as X,Y you need to index your data as data(Y,X) although obviously for 90,90 this would make no difference,

[Joaquim]

(90,90) was just an example. Thank you, it solved the problem!

[Adam]

I'll add it as an answer then. Given that example I wasn't confident it was a solution, hence the comment instead.

Answer 1

[Adam]

You have to be careful with X,Y and rows, columns when indexing into a matrix. To get the value reported as X,Y you need to index your data as data(Y,X) although obviously for 90,90 this would make no difference.