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**Content Feed**

Error in testing neural

i just found my error, the test matrix should have the same dimensions as the train

6 years ago | 0

Question

Error in testing neural

Hello, i have trained my neural with matrix X [40 30] the Target is [3 30]. Now i have Test matrix [4 10] and every time i try t...

6 years ago | 1 answer | 0

### 1

answerQuestion

Understanding neural networks with patternet

Hello, i am new to neural networks and find it difficult to understand a few things about them. First of all i have created wi...

6 years ago | 1 answer | 0

### 1

answerQuestion

Split signal if there are zero values

Hello, my task is simple i want to divide my signal into number x parts, where x is when the difference between the last nonzero...

6 years ago | 1 answer | 0

### 1

answerQuestion

Code including multiply embedded for loops with conditions

Hello, i have a signal (nfo) and having found its peaks (pks) and minima (val) i should do the following : If it starts with pea...

6 years ago | 0 answers | 0

### 0

answersExtending a vectors length with zeros

Lets assume x(1x3) and y(1x8) Padd=[x,zeros(1,length(y)-length(x))];

6 years ago | 1

How to calculate moving standard deviation in a matrix?

Take a look here <http://www.mathworks.com/matlabcentral/fileexchange/9428-movingstd-x-k-windowmode->

6 years ago | 0

create a while loop: while all values in a matrix are positive(code)

You can use the absolute value abs function , or if there are some non positive, by mistake, you can say a(a>0); where...

6 years ago | 0

Extract the data vectro from cftool

For everyone having the same issue i found a bypass way. Although after i plot the data and when i zoom in i can see clearly the...

6 years ago | 1

| accepted

how to show a velocity vector at any two point in matlabs on path curve.also acceleration vector at any two point on velocity curve.

If this is the case ou can use plot and hold on to achieve it. t=( 0:0.01:3); x = t.*exp(-3*t)+0.25*exp(-3*t); v=exp(...

6 years ago | 0

Question

Extract the data vectro from cftool

Hello, i have performed curve fitting with cftool , but i cannot accomplish to extract the smoothed data as vector. Instead i ca...

6 years ago | 1 answer | 0

### 1

answerHow to write a loop for vectors?

Hello, the main issue is that in your loop you should use cell because for every iteration you have different dice results and t...

6 years ago | 0

Question

Divide time series into regions

Hello, i have a graph with rapidly changes and i need to divide it into regions like are shown in the picture <</matlabcentra...

6 years ago | 2 answers | 0

### 2

answersQuestion

Normalized cross-correlation function

Hello, i am trying to write a normilized cross-correlation method function , but i can't complete it. Here are the details of th...

6 years ago | 3 answers | 0

### 3

answersHow do I solve this?

See hold <http://www.mathworks.com/help/matlab/ref/hold.html> .

6 years ago | 0

How can I divide an audio signal into overlap frames and take FFT to the signal?

There is a function called spectrogram which does what you want , see the related documentation <http://www.mathworks.com/help/s...

6 years ago | 0

Question

help with nested indexing

Hi, my problem is not difficult but i am getting confused about it. So i have two vectors of indexes Nzlocs and locs ...

6 years ago | 1 answer | 0

### 1

answerQuestion

Audioread in loop faster way

Hello, i need to read multiply audio files so i wrote for idx=1:Num filename =['my_dir\data\a',int2str(idx),'.wav']...

7 years ago | 1 answer | 0

### 1

answerDelete empty cell array

have you tried something like this? for i=1:length(your_cell_size) idx(i) = find(~cellfun(@isempty,A{i})); ...

7 years ago | 0

Question

Filter signals with variety in noise level

Hello, i am working in a project where i track the fundamental frequency (f0) of a signal using autocorrelation. The algorithm w...

7 years ago | 1 answer | 0

### 1

answerHow can i randomly move the values of a vector

use randperm take a look here http://www.mathworks.com/help/matlab/ref/randperm.html

7 years ago | 1

| accepted

Question

Find with condition in loop can't create cell array

Hello, i have to crate a new vector that will have the different number of peaks in each row for each pulse. So i have this grap...

7 years ago | 1 answer | 0

### 1

answerHow to segment an wav file off to 2 second interval and FFT every 2 second.

There is the spectrogram take a look here <http://www.mathworks.com/help/signal/ref/spectrogram.html> which performs STFT. Also ...

7 years ago | 0

Question

frequency modulation sinwave with 3 different frequencies

Hi, i want to make a sinwave that will change his frequency 3 times (like in the picture i uploaded <</matlabcentral/answers/...

7 years ago | 0 answers | 0

### 0

answersQuestion

Custom Triangle with up/down slopes , help

Hello i want to make a coustom triangle without using the existing function of matlab, which will start lets say at 300 and will...

7 years ago | 1 answer | 0

### 1

answerQuestion

Creating Mel triangular filters function

Hello, i know there are already plenty functions that create mel filter banks , but i need to create my own function. I found i ...

7 years ago | 2 answers | 0