MATLAB: Combine two double variables into a single variable

combineconcatenationdoubleecgmatrix

I am working on an ECG to diagnose heart conditions. The user imports a text file that has a unique amount of data points(mV) and a time step. I have extracted both to cells and converted them to a double by using str2double. The amount of data points and time step varies depending on which text file the user imports (e.g. file1 has 7500 and dt = .0008, file2 has 9000 and dt = .001). dataPoints is a n x 1 double and t (dependent on length(dataPoints)) is also n x 1 double. Since n is arbitrary I am unsure how to combine these into a single variable ECG_data.

Best Answer

For example:

ECG_data = [dataPoints, t]; % Create n-by-2 matrix.

It will work as long as both dataPoints and t are n rows each (the number of columns in each does not matter).

Related Solutions

MATLAB: Unable to perform assignment because the left and right sides have a different number of elements.

Since ecgBR has only one row, not n, you cannot do ecgBR(n, 1), which is the nth row in column 1. But you have 3600 columns, not 1, and 1 row, not 3600. Get rid of the ,1:

for n=5:numel(ecgBR)
    ecg_dif(n)=abs(ecgBR(n)-ecgBR(n-2));
    ecg_dif2(n)=abs(ecgBR(n)-2*ecgBR(n-2)+ecgBR(n-4));
end

MATLAB: Creating a datastore from multiple .csv files with different variables

location1 = fullfile('matlabroot','/home/user/filelocation'); ds = datastore({location1},'Type','csv',... 'FileExtensions',{'.txt','.csv','.xls'});

this will read all the files sequentially, then you can combine the values column.

Best Answer

Related Solutions

MATLAB: Unable to perform assignment because the left and right sides have a different number of elements.

MATLAB: Creating a datastore from multiple .csv files with different variables

Related Question