write a script that can determine if a stretch value for "hst test" has decreased by 20% in matlab

Here is an example code to check if a stretch value for "hst test" has decreased by 20%. You can replace the stretch_value variable with your own value and modify the percentage decrease as per your requirement.

main.m
stretch_value = 50; % replace with your own value
previous_value = 60; % replace with the previous value of stretch_value

if stretch_value <= 0.8*previous_value % checking for 20% decrease
    fprintf('Stretch value has decreased by 20%%');
else
    fprintf('Stretch value has NOT decreased by 20%%');
end
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In this script, we first define our current stretch_value and the previous_value of stretch_value. We then use an if statement to check if the current stretch_value is less than or equal to 80% of the previous_value. If it is, we print a message saying that the stretch value has decreased by 20%. If it is not, we print a message saying that the stretch value has not decreased by 20%.