矩形光栅的matlab代码

Sure! Here's a simple MATLAB code for generating a rectangular grating:

% Parameters
width = 500; % Width of the grating
height = 200; % Height of the grating
period = 20; % Period of the grating (distance between each line)
amplitude = 1; % Amplitude of the grating

% Create a blank image
grating = zeros(height, width);

% Generate the grating pattern
for i = 1:height
    for j = 1:width
        if mod(j, period) < period/2
            grating(i, j) = amplitude;
        else
            grating(i, j) = -amplitude;
        end
    end
end

% Display the grating
imshow(grating);

This code creates a blank image and then generates a rectangular grating pattern by iterating over each pixel and setting its value based on the position within the period. The resulting grating is then displayed using the `imshow` function.

Feel free to adjust the parameters (width, height, period, amplitude) to customize the grating pattern as per your requirements.