I have a problem with the MATLAB user interface, please guide me. I’ve made a project, In my project I want to call the amount of strings from the editing box and show it on the load bar diagram. The String value can be variable, and I want to automatically display this new value every time the String value changes.

help me.

thank you

@Christoph – I was just informed by CRC that they fixed the problem with the MZK07 promo code and it should now be active again.

@Christoph – thanks for letting me know. I’ve asked CRC about it – I will let you know when I hear back from them.

Is the promo code still valid? Or is there another promo code I can use?

Thanks

Christoph

The data variable used in the code is indeed a Matlab struct which is generated separately. Most of its fields are precomputed constants, and only the phase data is loaded from the AFRL data file. Here is the code snippet that Pavel Emeliyanenko used to generate the data struct for the SAR functions:

Np = 128;  % columns (azimuth points)
K  = 128;  % rows (frequency samples)

B = 0.591 * 10^9;   % bandwidth (Hz)
fc  = 9.6 * 10^9;   % center frequency (Hz)
data.dr = 0.304700; % range resolution (m)
data.dx = 0.304700; % cross-range resolution (m)
data.maxWr = data.dr*(K-1);  % maximum scene size in range direction (m)
data.maxWx = data.dx*(Np-1); % maximum scene size in cross-range direction (m)

data.deltaF = B / (K-1);
data.Nfft = K*10;

xl=-3; xr=3; yl=-3; yr=3;
nx=500; ny=500;
stepx=(xr-xl)/nx;
stepy=(yr-yl)/ny;
[data.x_mat, data.y_mat] = meshgrid(xl:stepx:xr, yl:stepy:yr);
data.z_mat = zeros(size(data.x_mat));

data.minF = ones([1,Np]) * (fc - B/2);

T = 0 : 1/(Np-1) : 1;
data.AntX = T; %T.^3-3.*T.^2-1;
data.AntY = T; %T.^5-2.*T-1;
data.AntZ = ones(size(data.AntX))/5;
% distance to SAR mo-comp. point
data.R0 = sqrt(data.AntX.^2 + data.AntY.^2 + data.AntZ.^2); 

% Read the complex phase data from the AFRL data file
fp = fopen('HB05022.002.all', 'r', 'l');
amp = fread(fp, [K,Np], 'float=>float');  % real data
ph  = fread(fp, [K,Np], 'float=>float');  % imaginary data
fclose(fp);
data.phdata = single(amp) + single(ph) * 1i;

I variable imgdata is produced which looks to be complex indicating phase data but is not a structure.
Please provide a proper example file or method to read the files from the AFRL link.

Thank you.

Thanks for the kind feedback. I would appreciate if you could add a positive comment about the book on Amazon (direct link), for the benefit of others.

Thanks in advance!

@Sergey – thanks for the feedback. Your correction is (well) correct 🙂 I’ve added it to the Errata table above.

Please be kind enough to provide feedback on the book at Amazon (link)

I am reading you book and find it very useful. I believe I have found a small bug on page 82, last code snippet. I think it should rather be something like this:

[sortedData , sortedDataIdx ] = sort(data);
[uniqueVals , sortedStartIdx] = unique(sortedData);
sortedEndIdx = [sortedStartIdx(2:end)'-1,length(data)];
for idx = 1:length(uniqueVals)
    dataIdx = sortedDataIdx( sortedStartIdx(idx) : sortedEndIdx(idx) );
end

Sorry if I misunderstood you code and mistakenly called it a bug.

Sergey