How to downsample a matrix in columns ? MATLAB [closed]

1. How to do downsampling in Matlab?
2. How do you select a few columns from a matrix in Matlab?
3. How do you access the columns of a matrix in Matlab?
4. How do you decimate a signal in Matlab?

How to do downsampling in Matlab?

y = downsample( x , n ) decreases the sample rate of x by keeping the first sample and then every n th sample after the first. If x is a matrix, the function treats each column as a separate sequence. y = downsample( x , n , phase ) specifies the number of samples by which to offset the downsampled sequence.

How do you select a few columns from a matrix in Matlab?

Typically, it would be: xdatatemp =xdata(:,77:86) - to select columns 77 to 86.

How do you access the columns of a matrix in Matlab?

If you want to access all of the rows or columns, use the colon operator by itself. For example, return the entire third column of A . In general, you can use indexing to access elements of any array in MATLAB regardless of its data type or dimensions. For example, directly access a column of a datetime array.

How do you decimate a signal in Matlab?

y = decimate( x , r ) reduces the sample rate of x , the input signal, by a factor of r . The decimated vector, y , is shortened by a factor of r so that length(y) = ceil(length(x)/r) .