Select multiple frames from a single fits file

Hi,

I have a csv file and a fits file, I need to select multiple frames from the fits file based on the non-zero indices of a csv file. In the attached csv file, I need to select the 4th and 7th frame from the fits file, as it contains the non-zero values.Can someone help?

TIA

Answer 1

[Walter Roberson]

vals = csvread('Book4.csv');
frame_numbers = find(vals ~=0);
num_frame = length(frame_numbers);
frame_data = cell(num_frame,1);
for K = 1 : num_frame
    frame_data{K} = fitsread('AppropriateFilenameGoesHere.fits', 'image', frame_numbers(K));
end

[Kiruthiga Sekar]

It is throwing the index value out of range error

[Walter Roberson]

You do not have multiple frames in your fits file. You have a single frame that is multidimensional.

csv_filename - 'Book4.csv';
fits_filename = 'AppropriateFilenameGoesHere.fits';

vals = csvread(csv_filename);
frame_numbers = find(vals ~=0);
num_frame = length(frame_numbers);

finfo = fitsinfo(fits_filename);
imdims = finfo.Image.Size;
frame_data = zeros(imdims(1), imdims(2), num_frame);

for K = 1 : num_frame
    frame_data(:,:,K) = fitsread(imdims, 'image', 'pixelregion', {[1 imdims(1)], [1 imdims(2)], frame_numbers(K)});
end

[Kiruthiga Sekar]

Thanks for your help. I'm new to MATLAB.

Getting an error:

Reference to non-exixtence field 'Image'.

[Walter Roberson]

Please show the content of the finfo variable .

[Kiruthiga Sekar]

It is a single file with 2600 frames.