Error message when using findpeaks and csvread

Hi,

I am using findpeaks to detect peaks on ECG data (attached). I get the following error message:

Error using findpeaks>parse_inputs (line 325)
Error: File: strncmpi.m Line: 1 Column: 1
The input character is not valid in MATLAB statements or expressions.

Error in findpeaks (line 132)
  = parse_inputs(Yin,varargin{:});

Also, when loading the csv file using csvread I get the following error:

usage: unique (x) or unique (x, 'rows')Undefined function or variable 'toascii'.

Error in dlmread (line 143)
  throw(exception);

Error in csvread (line 47)
    m=dlmread(filename, ',', r, c);

I could open the csv file and find peaks successfully maybe 2 weeks ago but now it fails with the same code.

Many thanks,

SJ

[KSSV]

What code you have tried? Show us here.....also what does which findpeaks shows on the screen?

Answer 1

[Cong Ba]

Try this (remember to put the csv file in the working folder):

data = csvread('baselinesmooth.csv');
[pks,locs] = findpeaks(data);
plot(data); hold on;
plot(locs, pks, 'o');

If this doesn't work correctly, could you tell us the version of MATLAB you're using?