MATLAB: Plot a complex data

digital image processingimage analysisimage processing

I have been trying to plot a data of magnetic fields obtained from a commercial software. So, far my code is:
[dataBx, dataBy, dataBz]= ReadData(infoFile, gemFile, dataFileBxr, dataFileBxi, dataFileByr, dataFileByi,dataFileBzr, dataFileBzi);
x = (dataBx);
y = (dataBy);
z = (dataBz);
img = (((imag(x) - ((1i)).*(imag(y))/2)));
clims = [min(min(img)) max(max(img))*1E-1];
subplot(2,1,1);
hold all
plot (img)
colormap jet;
subplot(2,1,2);
h_img = imagesc(rms(img)); 
axis square; 
colormap jet;
dataBx, dataBy and dataBz consists of complex numbers which I read in first two line. Then, I stored it in x, y and z respectively. Then, I used the formula: (img=(B1x-B1y)/2). So, here in this code, I represented B1x as x and B1y as y.
Then, I tried to plot it and get the value of magnetic field in colormap values as I obtained from a commercial software. But, I am not able to get that value. I don't know what is wrong here. Can anyone suggest me something? I have tried a lot of things but I am not able to work it out.
May be the formula of clims is wrong.

Best Answer

The call to plot
plot (img)
looks wrong, because img is 2-D. I would expect you to be using image(), imagesc() or imshow() to inspect the array at this point.
The call to imagesc
h_img = imagesc(rms(img));
looks wrong because rms(img) is 1-D. I would expect you to be using plot() at this point, assuming that you do want to see the rms of each column of img (which is what rms() computes).
Related Question