Importing CSF file to matlab and accessing columns

I'm trying to do a spectral analysis of an ADC that I'm designing in CADENCE.

I have my output data in a CSV file(time and ouptut voltage). I tried to import the data into MATLAB using the csvread() command. But how to I access speciific columns in the CSV file

I will have to run an fft() on the voltage data. I have to access this column alone.

Answer 1

[Kojiro Saito]

Assume you have a following CSV file,

sample.csv

time,voltage
1,100
2,101
3,104
4,105

you can access to the specific column by specifying column number (data(:, colnum)). For example,

data = csvread('sample.csv', 1, 0);
f = fft(data(:,2));

csvread reads CSV file as matrix, but I would use readtable instead of csvread because it's much easier to access to specifc columns by using column names.

data = readtable('sample.csv');
f = fft(data.voltage);