trim a plot and modify mesh

hi, I would like some advice on how to do this job: I have the plot obtained in matlab available. this plot presents several frames, one after the other, like film. each frame has dimensions of 0.025x0.1.

I have to do two things:

• cut each frame separating it from the others
• and then I have to convert the above dimensions to 0.1x0.1. for this activity I thought of using the griddata function, which allows me to switch from initial to final coordinates.

Thanks in advance for the advice

Answer 1

[AKennedy]

Step 1: Extract Frames

Assuming img is your data matrix and you know the dimensions and positions of each frame:

% Define frame dimensions and number of frames
frameHeight = 0.025; % Original height
frameWidth = 0.1;    % Original width
numFrames = 10;      % Example number of frames

% Preallocate cell array for frames
frameData = cell(1, numFrames);

% Extract each frame
for i = 1:numFrames
    % Calculate indices for each frame (replace with actual logic)
    rowStart = ...; % Define based on frame position
    rowEnd = rowStart + frameHeight - 1;
    colStart = ...;
    colEnd = colStart + frameWidth - 1;

    % Extract the frame
    frameData{i} = img(rowStart:rowEnd, colStart:colEnd);
end

This will adjust rowStart, rowEnd, colStart, and colEnd based on the actual positions of your frames within the data.

Step 2: Resize Frames

Using imresize (https://www.mathworks.com/help/matlab/ref/imresize.html) for simplicity, especially if working with image data:

% Define new dimensions
newHeight = 0.1; % New height
newWidth = 0.1;  % New width

% Resize each frame
resizedFrames = cell(1, numFrames);
for i = 1:numFrames
    resizedFrames{i} = imresize(frameData{i}, [newHeight, newWidth]);
end