Answered
beginner question :subject : For loops , while loops , index variable
This is what I would do: for k=1:length(t) if t(k)<=0 y4(k)=3*t(k)^2 + 5; else y4(k)=-3*t(k)^2 + 5; ...

9 years ago | 0

Answered
Using the 'diff' function inside the 'find' function.
Her is my guess. Why don´t you just store k in a vector? I mean something like aux= zeros(length(d2x)); aux2=1; for k...

9 years ago | 0

Answered
How fill a part of 3D array with decreasing values?
I think you are trying to do something like this >> a=20:-2:2; >> for i=1:10 for j=1:10 X(i,j,1:10)=a(1:10); en...

9 years ago | 0

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Answered
How I can know elements of a matrix
If you want to find if you have a 1000 in your matrix try the same thing, but change 1 for 1000 find(I==1000) Will retu...

9 years ago | 0

Answered
How I can know elements of a matrix
When you multiply the matrix by 1000 you have binary values(1 and 0 true false)no more.So I don´t know what you exactly mean by ...

9 years ago | 0

Answered
How can I open excel file in Mathlab
Use the xlsread function to read the excel values and store them in a vector, so that you can represent them using the plot comm...

9 years ago | 0

Answered
can anyone help me in finding out the location of zero crossing point of an signal whose peak is determined
Hi,if you have a signal like this c = Columns 1 through 15 0 1 2 3 4 5 6 7...

9 years ago | 0

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how to analyze frequency response ?
Hi Gokul, freqz is used to find the frecuency response, once you have designed your b and a vectors. [h,w]=freqz(b,a,n) ...

9 years ago | 0

Answered
NEED ANSWERS IN NUMERICAL FORM
Try this: >> a= input('Enter First Strain Gauge readings'); b= input('Enter Second Strain Gauge readings'); c= input(...

9 years ago | 1

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what is wrong when using fzero
You can use solve instead of fzero

9 years ago | 0

Question


Is there a way to free RAM consumed by Matlab without closing Matlab?
Hi,I am working with a program which is consuming a huge amount of RAM memory, and I would like to know if it is possible to fre...

9 years ago | 5 answers | 1

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answers

Answered
How to pass a audio signal through a filter
This is fine at the moment. Now filter with from 0 to 4000Hz to make sure the results are different(I mean if you filter from 40...

9 years ago | 0

Answered
How to pass a audio signal through a filter
The first step is to design a filter to obtain the A and B vector coefficients.Then use the Butter function, for instance to obt...

9 years ago | 1

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Answered
How to find the value of R ?
Is this what you mean? >> A=27; >> E=1:1:10; >> R = 0.173*(E.^3/2)*A.^1/3 R = Columns 1 through 9 ...

9 years ago | 0

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Answered
Solving a complicated equation in matlab
I think there is nothing wrong with your code. If I do f(-0.351409329825233) the answer is ans = -3.9968e-...

9 years ago | 1

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Answered
Finding jacobian of a matrix
The jacobian command calculates symbollically the jacobian of a given matrix. The following example can be found in the Mathw...

9 years ago | 0

Answered
problems about solve exponential function
When you execute this code in Matlab >> syms x; >> f=-10*exp(-x); >> solve(f,x) >> isempty(a) ans = ...

9 years ago | 0

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Answered
problems about solve exponential function
In the warning message displayed by Matlab it says no solution has been found(just as it happens if the function has no roots), ...

9 years ago | 0

Question


cannot figure out the reason for a warning message
Hi, I am working with a piece of code, and though the code seems to work well(as the results yielded seem to be correct)Matlab s...

9 years ago | 0 answers | 0

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Answered
Find vector elements that sum up to specific number
I don´t know any specific Matlab command to adress your problem, however you can write an M-file to solve your problem. A po...

9 years ago | 0

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Suggest a data structure to represent a set of geographical points
Try using multidimensional arrays. The idea is that the "third dimension" represents the index of your bidimensional latitude-lo...

9 years ago | 0

Answered
problem with imag command when evaluating symbolic expressions.
The answer is right, if you try subs((9*i*conj(x))/2 - (i*y)/2 - (9*i*x)/2 + (i*conj(y))/2 + 4),{x,y},{0,0}) or subs((9*i*conj(x...

9 years ago | 0

Question


problem with imag command when evaluating symbolic expressions.
Hi, when I execute the following code in Matlab syms x y; f=4*i+9*x+y; imag(f) I get the following result ans = ...

9 years ago | 2 answers | 0

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Answered
Discrete acceleration data to position
I am not sure, but theoretically ,if you have acceleration, and you want to get displacement, you have to integrate to get veloc...

9 years ago | 0

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Answered
What will be the sampling frequency of the following time series data??
I am not sure I am understanding your question very well, but it seems you have a sample every 0.00274 units of time. You have t...

10 years ago | 0

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Question


How can I solve a problem with subs?
I have to substitute values in a matrix with 20 variables. I substitute variable after variable using a for loop, but in some ca...

10 years ago | 1 answer | 0

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