Hi E,
I understand you’re having trouble condensing data that you’ve generated using the fit function. I noticed a few potential typos in your code. See my comments in green:
r = randi([0, 100], 31,19) %Power functions are unable to fit to data where X may contain nonpositive values; change the range from [0-100] to [1-100]
b = (r(:,1));
b2=b(:,2:end); %I think you meant to write b2 = r(:,2:end)
for i= 1:size(b2,2)
f{i}= fit(b, b2(:,i),'power1') %The appropriate syntax for a fit function would be f = fit(b, b2(:,i),'power1')
end
In addition to the coeffvalues function, you will also want to use the confint function to obtain the confidence levels associated with each result. With that being said, consider the revised following revised code (see comment below). The first iteration of the for loop populates the first two columns of an array with the corresponding coefficients and confidence intervals determined by fitting the data. The for loop executes a total of 18 times, so the result is a 3-by-36 array where the first row stores the coefficients and the second two rows store the corresponding lower and upper bounds. The array2table function then converts the array to a table.
