Answered

Calculating frequency of a sine wave with varying frequency

Look at this page http://www.mathworks.es/es/help/signal/ref/spectrogram.html

Calculating frequency of a sine wave with varying frequency

Look at this page http://www.mathworks.es/es/help/signal/ref/spectrogram.html

environ 5 ans ago | 0

Answered

help solving string question

a=[1 2 3 4 5]; >> b=zeros(1,length(a)); count=1; l=length(a); while(count<=l) b(count)=a(l+1-count); count=c...

help solving string question

a=[1 2 3 4 5]; >> b=zeros(1,length(a)); count=1; l=length(a); while(count<=l) b(count)=a(l+1-count); count=c...

environ 5 ans ago | 0

Answered

How to sort all the columns of a file into a single column?

Try reshape(A,numel(A),1)

How to sort all the columns of a file into a single column?

Try reshape(A,numel(A),1)

environ 5 ans ago | 1

| accepted

Answered

How to find frequency components from a signal?

Your question is perhaps too generic, however to find frequency components of a signal in Matlab the FFT command is braodly used...

How to find frequency components from a signal?

Your question is perhaps too generic, however to find frequency components of a signal in Matlab the FFT command is braodly used...

environ 5 ans ago | 1

| accepted

Answered

How do I make a master script that can call other scripts?

Imagine you have the following 3 different .m files function y=master(a,b) y=y1(a)+y2(b); function y=y2(b) y...

How do I make a master script that can call other scripts?

Imagine you have the following 3 different .m files function y=master(a,b) y=y1(a)+y2(b); function y=y2(b) y...

environ 5 ans ago | 0

Answered

introducing the function in Matlab

Probably you have not stored the function in your working directory.Just change your working directory to the directory where yo...

introducing the function in Matlab

Probably you have not stored the function in your working directory.Just change your working directory to the directory where yo...

environ 5 ans ago | 0

Answered

fft: significant peak in 0 Hz component

From your code and the file uploded I can see ypur sampling frequency is 1000 Hz and you are trying to represent frequencies up ...

fft: significant peak in 0 Hz component

From your code and the file uploded I can see ypur sampling frequency is 1000 Hz and you are trying to represent frequencies up ...

environ 5 ans ago | 1

Answered

fft: significant peak in 0 Hz component

You are right, the 0 Hz component is DC mean component Try something like x=x-mean(x); y = detrend(x,'constant') ...

fft: significant peak in 0 Hz component

You are right, the 0 Hz component is DC mean component Try something like x=x-mean(x); y = detrend(x,'constant') ...

environ 5 ans ago | 0

Answered

Dirac function and matlabFunction

The problem is this line of the code dirac(x + 0.5, 1), dirac only allows one argument. Why do you include the second parameter ...

Dirac function and matlabFunction

The problem is this line of the code dirac(x + 0.5, 1), dirac only allows one argument. Why do you include the second parameter ...

environ 5 ans ago | 0

Answered

Hello,how can I separate the audible samples from unaudible or less audible samples in audio file. I want to hide my secret message in less audible samples on the basis of frequency. So basically how can I find the frequency of samples.

The human ear can hear signals within 20 Hz to 20 kHz range. So you can apply a bandpass filter in this frequency range. If you ...

Hello,how can I separate the audible samples from unaudible or less audible samples in audio file. I want to hide my secret message in less audible samples on the basis of frequency. So basically how can I find the frequency of samples.

The human ear can hear signals within 20 Hz to 20 kHz range. So you can apply a bandpass filter in this frequency range. If you ...

environ 5 ans ago | 0

Answered

increment values which are larger than three

Try A=[ 2 1 3; 4 2 5; 1 1 6] a=find(A>3); A(a)=A(a)+1

increment values which are larger than three

Try A=[ 2 1 3; 4 2 5; 1 1 6] a=find(A>3); A(a)=A(a)+1

environ 5 ans ago | 1

Answered

How can I implement FFT (y-axis:Power, x-axis:Frequency) with 4 cases: Lowpass/Highpass/Band/Notch

If you want to filter a signal in the frequency domain you just need to multiply your signals' frequency response (y in your cod...

How can I implement FFT (y-axis:Power, x-axis:Frequency) with 4 cases: Lowpass/Highpass/Band/Notch

If you want to filter a signal in the frequency domain you just need to multiply your signals' frequency response (y in your cod...

environ 5 ans ago | 0

| accepted

Answered

psd of any signal

Try something like this N = length(x); xfft = fft(x); psdx = (1/(2*pi*N)).*abs(xfft).^2; freq = 0:(2*pi)/N:2*pi-(2...

psd of any signal

Try something like this N = length(x); xfft = fft(x); psdx = (1/(2*pi*N)).*abs(xfft).^2; freq = 0:(2*pi)/N:2*pi-(2...

environ 5 ans ago | 0

Answered

FINDING MAX FREQUENCY OF A EARTHQUAKE DATA

If you just need to find the maximum frequency, you could calculate the fourier transform and find out the highest frequency con...

FINDING MAX FREQUENCY OF A EARTHQUAKE DATA

If you just need to find the maximum frequency, you could calculate the fourier transform and find out the highest frequency con...

environ 5 ans ago | 0

Answered

Calculation the coordinate of a point

I will give you some clues You have points (x1,y1)(known) and point (x2,y2) (unknown),so you have two unknown variables, so y...

Calculation the coordinate of a point

I will give you some clues You have points (x1,y1)(known) and point (x2,y2) (unknown),so you have two unknown variables, so y...

environ 5 ans ago | 0

Answered

Regarding distance determination in an ellipse from a matlab ( 2013) plot

In the case you are not working with a large number of plot you can use the ginput command (you place the mouse in a point and M...

Regarding distance determination in an ellipse from a matlab ( 2013) plot

In the case you are not working with a large number of plot you can use the ginput command (you place the mouse in a point and M...

environ 5 ans ago | 0

Answered

How to convert matlab .m code into simulink model ?

Have a look at this http://www.mathworks.es/es/help/simulink/ug/creating-an-example-model-that-uses-a-matlab-function-block.h...

How to convert matlab .m code into simulink model ?

Have a look at this http://www.mathworks.es/es/help/simulink/ug/creating-an-example-model-that-uses-a-matlab-function-block.h...

environ 5 ans ago | 0

Answered

Please can you help me do the following. Where a k and B are positive constants

If a, k and B are constants just asign the value they have and solve, there is no need to declare them as a syms variable. ...

Please can you help me do the following. Where a k and B are positive constants

If a, k and B are constants just asign the value they have and solve, there is no need to declare them as a syms variable. ...

environ 5 ans ago | 0

Answered

Hey guys I'm new to MAT LAB.

The way signals are generated here http://www.mathworks.es/es/help/matlab/ref/fft.html is what you are looking for.The only para...

Hey guys I'm new to MAT LAB.

The way signals are generated here http://www.mathworks.es/es/help/matlab/ref/fft.html is what you are looking for.The only para...

environ 5 ans ago | 0

| accepted

Answered

How to measure pitch period. for each letter section??

There are many methods to do, the autocorrelation approach is easy and quite effective. You can calcute your signal's autocorre...

How to measure pitch period. for each letter section??

There are many methods to do, the autocorrelation approach is easy and quite effective. You can calcute your signal's autocorre...

environ 5 ans ago | 0

| accepted

Solved

Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

plus de 5 ans ago

Answered

<randum number generation

In r you have the numbers you requested r=zeros(52,1); pointer=0; for k=1:52 r(k)=pointer+(1+round(7*rand)); po...

<randum number generation

In r you have the numbers you requested r=zeros(52,1); pointer=0; for k=1:52 r(k)=pointer+(1+round(7*rand)); po...

plus de 5 ans ago | 0

Answered

How to plot a function ?

Some ideas here function y=new(a,b) if(a<0) disp('a must be bigger than zero'); end if(b<0||b>1) disp('a must ...

How to plot a function ?

Some ideas here function y=new(a,b) if(a<0) disp('a must be bigger than zero'); end if(b<0||b>1) disp('a must ...

plus de 5 ans ago | 0

| accepted

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN

Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

plus de 5 ans ago

Answered

How to calculate a max value in a array without the built in functions.

A very easy newbie way to do it using a while loop (better with a for loop as Mischa states) >> Time = [1,6,3,6,8,12,1]; ...

How to calculate a max value in a array without the built in functions.

A very easy newbie way to do it using a while loop (better with a for loop as Mischa states) >> Time = [1,6,3,6,8,12,1]; ...

plus de 5 ans ago | 0

Answered

How can I draw a circle in matlab using parametric ecuations or the circle ecuation?

>> t=-pi:0.01:pi; >> y=sin(t); >> x=cos(t); >> plot(x,y)

How can I draw a circle in matlab using parametric ecuations or the circle ecuation?

>> t=-pi:0.01:pi; >> y=sin(t); >> x=cos(t); >> plot(x,y)

plus de 5 ans ago | 0

Answered

how to fft of a signal taken from an accelerometer data.

If you can apply xlsread(as I infere from your tags) to put your raw data into a matlab vector all you need can be found in this...

how to fft of a signal taken from an accelerometer data.

If you can apply xlsread(as I infere from your tags) to put your raw data into a matlab vector all you need can be found in this...

plus de 5 ans ago | 0

| accepted

Answered

How to generate a signal with time varying frequency?

This is a simple way to do it f=0:0.1:100; int=cos(2*pi.*f);

How to generate a signal with time varying frequency?

This is a simple way to do it f=0:0.1:100; int=cos(2*pi.*f);

plus de 5 ans ago | 0

Answered

How to apply hamming window for a frequency domain signal?

Why can't you apply the Hamming window in the time domain, and then compute the FFT of the resultant signal? On the other ha...

How to apply hamming window for a frequency domain signal?

Why can't you apply the Hamming window in the time domain, and then compute the FFT of the resultant signal? On the other ha...

plus de 5 ans ago | 1

Answered

How to solve complex equations in matlab.?

I think he wants to actually solve the equation, so perhaps he is looking for something like this >> syms R; Y=-(1-R)/(1...

How to solve complex equations in matlab.?

I think he wants to actually solve the equation, so perhaps he is looking for something like this >> syms R; Y=-(1-R)/(1...

plus de 5 ans ago | 0

| accepted