MATLAB: How should I correctly use findpeaks() so that the output will not show me the following error

errorfindpeaks

data=dlmread('Ge single crystal transmission.txt');
pks=findpeaks(data)
Error using findpeaks
Expected Y to be a vector.
Error in findpeaks>parse_inputs (line 191)
validateattributes(Yin,{'numeric'},{'nonempty','real','vector'},…
Error in findpeaks (line 134)
= parse_inputs(Yin,varargin{:});
please help me out. been stuck for days;(
PS: the version of matlab I used is R2016a

Best Answer

Data is a matrix of Nx2. You just need to select which vector you want to use to search for the peaks. I guess is the second one, while the first is X-values
data=dlmread('Ge single crystal transmission.txt');
pks=findpeaks(data(:,2))
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