Question

Labeling the columns in an array

If we import a .csv or Excel file using readtable, and then convert the table to an array as the following: Data=table2array(re...

11 jours ago | 1 answer | 1

Question

Correct choice of one sided frequency axis after fft

There are a lot of queries on fft frequency. I guess the following point not discussed anywhere explicitly (at least at one plac...

16 jours ago | 0 answers | 0

Question

How to replace numbers in a column vector after certain elements?

How should we proceed if we have a column vector X with 1000 elements, and we wish to replace all the values after a certain row...

17 jours ago | 1 answer | 0

Question

fftshift with even and odd number of data points (scaling the positive and negative frequency axis)

If we wish to draw double sided frequency axis, i.e., positive and negative frequencies with odd and even number of data points ...

environ 2 mois ago | 1 answer | 0

Question

How to add labels to an array or table (after conversion from an array)

I have an array of 2000 x 4 data points. I would like to add labels to the columns only. For example, Column 1 should be 'time/m...

environ 2 mois ago | 1 answer | 0

Question

Assigning indexes in an array and finding max values in a selected range

If we have X = time series data and signal in a 8000x 2 array (Matlab 2017b). The first column is time and the second column is ...

3 mois ago | 1 answer | 0

Question

Frequency scale in fft after zero filling (odd/even number of data)

Product: Matlab 2017b If we have data set "A" which consists of time versus light absorbance.There is another set of data "B"....

3 mois ago | 1 answer | 0

Question

How to combine sections from Workspace into a new vector?

I have Matlab 2017b. 1) If we have two vectors A and B, in the workspace (1000x1), each of same dimension. How can one combine...

3 mois ago | 1 answer | 0

Question

Creating Timetables: Error Message in SampleRate

Hello, I am trying to use a suggested function to generate a timetable with a sampling frequency of 200 Hz. tt = timetable(rand...

3 mois ago | 1 answer | 0

Question

Doing averages in blocks for downsampling time series data

One way to downsample is to do averaging in blocks. I had asked a question here "I would like to downsample data simulated at 20...

3 mois ago | 1 answer | 0

Question

Command for filling in zeros as powers of 2 for FT

If we two sets of signals (A and B) of unequal length, I am using zero padding first to make the length of B equal to A by using...

4 mois ago | 1 answer | 0

Question

How to treat a given column in a sheet from Workspace as a variable?

I am generating exponentially modified Gaussians (EMGs) from a simulation and wish to do FT on a selected sheet in the Workspace...

4 mois ago | 0 answers | 0

Question

How to read two Excel files and assign columns as variables in MATLAB?

Hello, I am using MATLAB 2017b. I have two Excel.xlsx files, call them A and B, containing time vs. instrument signals under two...

4 mois ago | 1 answer | 0

Question

Area under multiple peaks (Exponentially Modified Gaussians)

Hello, I have numerical data from an instrument (time vs. absorbance) consisting of three overlapping peaks (attached Excel). Is...

plus de 2 ans ago | 1 answer | 0