ax.gridalpha = 0.2; in matlab

To set the grid transparency in MATLAB, you can use the "grid alpha" property of the axes object. Here's an example of how to set the grid alpha to 0.2:

main.m
% Create a plot
x = 0:0.1:2*pi;
y = sin(x);
plot(x,y);

% Get the current axes object
ax = gca;

% Set the grid alpha to 0.2
ax.GridAlpha = 0.2;
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The gca function returns the current axes object, which you can then modify as desired. In this case, we set the GridAlpha property to 0.2 to make the grid more transparent.