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Carlos

86 total contributions since 2012

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

1 jour ago

Calculating frequency of a sine wave with varying frequency

plus de 5 ans ago | 0

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...

plus de 5 ans ago | 0

How to sort all the columns of a file into a single column?
Try reshape(A,numel(A),1)

plus de 5 ans ago | 1

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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...

plus de 5 ans ago | 1

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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...

plus de 5 ans ago | 0

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...

plus de 5 ans ago | 0

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 ...

plus de 5 ans ago | 1

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') ...

plus de 5 ans ago | 0

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 ...

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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 ...

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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

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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...

plus de 5 ans ago | 0

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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...

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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...

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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...

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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...

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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...

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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. ...

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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...

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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...

plus de 5 ans ago | 0

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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

<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...

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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

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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

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]; ...

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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)

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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

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