Don't use assignin and global variables.
Define your functions to return output arguments and call your functions with output arguments instead.
Also don't try to use the same name for your function and your variables.
theFilter = bandpassfilter(pd);
theDenoiser = waveletdenoiser(theFilter)
ssimer(pd,theFilter,theDenoiser)
maxer_miner(pd,theFilter,theDenoiser)
theScaler = scaler(theDenoiser,ratio_range_pd_waveletdenoiser)
two_d_plotter(pd,theFilter,theDenoiser,theScaler)
I don't know which of your function computes the ratio_range_pd_waveletdenoiser variable, but whichever one does should return it. Here's a general outline of how your bandpassfilter function should look:
function F = bandpassfilter(pd)
% Compute F using pd here
F = sum(pd); % replace with your actual commands
% When the code above calls bandpassfilter, whatever you define F to be in here
% will be stored in the theFilter variable when bandpassfilter finishes executing
end
