Answered

How can I store the output value from each for loop?

Hi The file = files' statement is quite crucial, but should be correct like this. The foor loop (by default) will loop throug...

How can I store the output value from each for loop?

Hi The file = files' statement is quite crucial, but should be correct like this. The foor loop (by default) will loop throug...

7 years ago | 0

| accepted

Answered

Plot with loop work only for the last

The matlab documentation is really good for that: <http://www.mathworks.com/help/matlab/ref/plot.html?searchHighlight=plot Pl...

Plot with loop work only for the last

The matlab documentation is really good for that: <http://www.mathworks.com/help/matlab/ref/plot.html?searchHighlight=plot Pl...

7 years ago | 0

Answered

How can I adjust a controller?

Hi Your basic procedure is correct, but you mixed up the parameters a bit. I admit that this is a bit confusing, but the str...

How can I adjust a controller?

Hi Your basic procedure is correct, but you mixed up the parameters a bit. I admit that this is a bit confusing, but the str...

7 years ago | 0

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Answered

How to assemble time series by smaller time series (or windows)

Could you specificy what you want in the end? A timeseries object? A separate data matrix for each case? If you want to conca...

How to assemble time series by smaller time series (or windows)

Could you specificy what you want in the end? A timeseries object? A separate data matrix for each case? If you want to conca...

7 years ago | 0

Answered

Getting Real & Imaginary Numbers From Nyquist(Sys)

Hi The values in RE and IM are, as you correctly assume, the real and imaginary values (of the vector w, which would be the 3...

Getting Real & Imaginary Numbers From Nyquist(Sys)

Hi The values in RE and IM are, as you correctly assume, the real and imaginary values (of the vector w, which would be the 3...

7 years ago | 0

Answered

Finding inverse cross-correlation

If I interpret your description of "inverse cross-correlation" correctly, wouldn't that just be the cross-correlation with one o...

Finding inverse cross-correlation

If I interpret your description of "inverse cross-correlation" correctly, wouldn't that just be the cross-correlation with one o...

7 years ago | 0

Answered

Error using sub2ind out of range subscript

Your code runs without error for me. Why do you have the variables declared as global? This is something to avoid whenever po...

Error using sub2ind out of range subscript

Your code runs without error for me. Why do you have the variables declared as global? This is something to avoid whenever po...

7 years ago | 0

Answered

how to replace consecutive 4 elements of an array with the largest element among every 4 consecutive element ?

One possibility would be the following: 1. reshape your vector as a 4xN matrix a=[12 58 16 56 23 7 8 45 53 56 12 32 ...

how to replace consecutive 4 elements of an array with the largest element among every 4 consecutive element ?

One possibility would be the following: 1. reshape your vector as a 4xN matrix a=[12 58 16 56 23 7 8 45 53 56 12 32 ...

7 years ago | 1

Answered

y(t)= a*t*exp(-a*t); z=summation(A(i)*y(t-T(i)).summation from i=1 to J. i need to partially differentiate z wrt A() and T()

And you want to do this symbolically? Looks to me that this would be a possibility: 1. create a variable for each summation i...

y(t)= a*t*exp(-a*t); z=summation(A(i)*y(t-T(i)).summation from i=1 to J. i need to partially differentiate z wrt A() and T()

And you want to do this symbolically? Looks to me that this would be a possibility: 1. create a variable for each summation i...

7 years ago | 0

Answered

How to extract only alphabets from mixed string

Hi You can use fancy functions like regexp or so, but this is my suggestion: str = 'BA9K90L'; % pick out letters ...

How to extract only alphabets from mixed string

Hi You can use fancy functions like regexp or so, but this is my suggestion: str = 'BA9K90L'; % pick out letters ...

7 years ago | 0

Answered

Bessel function of the first kind

Hi interesting question, thanks. The short answer is: there is (almost) nothing wrong with the code, except the *abs*, wh...

Bessel function of the first kind

Hi interesting question, thanks. The short answer is: there is (almost) nothing wrong with the code, except the *abs*, wh...

7 years ago | 1

Answered

what's the difference between writing 1.0 and 1. or 2.0 and 2. ?

There is not difference in matlab. Sometimes, people like to write "1." instead of 1 to make it easier to port to/from other pro...

what's the difference between writing 1.0 and 1. or 2.0 and 2. ?

There is not difference in matlab. Sometimes, people like to write "1." instead of 1 to make it easier to port to/from other pro...

7 years ago | 0

Answered

function on separate interval

This means that you have defined a function with an output (in your case the variable f), but have not assigned it. This would h...

function on separate interval

This means that you have defined a function with an output (in your case the variable f), but have not assigned it. This would h...

7 years ago | 0

| accepted

Answered

I need help plotting a range of stream lines in my velocity field plot.

Hi Nice plotting! I believe *contour* might help, something like %stream function psi = y.^2 - x.^2 - x -0.25; con...

I need help plotting a range of stream lines in my velocity field plot.

Hi Nice plotting! I believe *contour* might help, something like %stream function psi = y.^2 - x.^2 - x -0.25; con...

7 years ago | 2

| accepted

Answered

Check two string data without carriage return symbol

Why not just take the first row? I.e. Psvoltage = deblank(fscanf(obj1)) %, '%d', 4) if ( ~isempty(Psvoltage) ) ...

Check two string data without carriage return symbol

Why not just take the first row? I.e. Psvoltage = deblank(fscanf(obj1)) %, '%d', 4) if ( ~isempty(Psvoltage) ) ...

7 years ago | 0

| accepted

Answered

non linear equation, help me solve this please

Hi 1. What does the error say? _"The expression to the left of the equals sign is not a valid target for an assignment."_ ...

non linear equation, help me solve this please

Hi 1. What does the error say? _"The expression to the left of the equals sign is not a valid target for an assignment."_ ...

7 years ago | 0

Answered

My code uses the Euler scheme to solve an equation.How would I convert it to Runge Kutta scheme to make it faster for convergence.

Hi Not sure if I understand the question correctly, but you basically already have the answer, and most of the code you need....

My code uses the Euler scheme to solve an equation.How would I convert it to Runge Kutta scheme to make it faster for convergence.

Hi Not sure if I understand the question correctly, but you basically already have the answer, and most of the code you need....

7 years ago | 1

Answered

How to access variables with incremental names using for loop index?

You could use "eval", i.e. for i = 1:3 eval(sprintf('limb_ph%i_avg=mean(limb_ph%i)',i,i)); end but eval should be ...

How to access variables with incremental names using for loop index?

You could use "eval", i.e. for i = 1:3 eval(sprintf('limb_ph%i_avg=mean(limb_ph%i)',i,i)); end but eval should be ...

7 years ago | 0

Answered

How can I add a value to my array?

To answer your question, you *could* just concatenate them, e.g. x = [ 2 3 ]; % now add a 1: x = [ 1 x ]; ...

How can I add a value to my array?

To answer your question, you *could* just concatenate them, e.g. x = [ 2 3 ]; % now add a 1: x = [ 1 x ]; ...

7 years ago | 0

Answered

Only one Figure in plot

You can specify which figure you want to plot in bringing up the figure before (either through it's number or the figure handle)...

Only one Figure in plot

You can specify which figure you want to plot in bringing up the figure before (either through it's number or the figure handle)...

7 years ago | 0

Answered

Generating random ones and zeros controllably

You can generate a vector ( or matrix if you like ) with the desired number of zeros and ones, and then permute them randomly us...

Generating random ones and zeros controllably

You can generate a vector ( or matrix if you like ) with the desired number of zeros and ones, and then permute them randomly us...

7 years ago | 1

| accepted

Answered

The command svmtrain in LIBSVM matlab package takes input for values of C and g in quotes as a string value. I want to use the single code svmtrain repetitively by having different values for C and g. But how to do it?

What you essentially need to do is concatenate strings (and convert the number into a string). Let's say you want to test the ve...

The command svmtrain in LIBSVM matlab package takes input for values of C and g in quotes as a string value. I want to use the single code svmtrain repetitively by having different values for C and g. But how to do it?

What you essentially need to do is concatenate strings (and convert the number into a string). Let's say you want to test the ve...

7 years ago | 1

| accepted

Answered

Integration of fft data

Two possibilities: a) First use inverse fft to get acceleration, then integrate. b) Use integration property of Fourier Tr...

Integration of fft data

Two possibilities: a) First use inverse fft to get acceleration, then integrate. b) Use integration property of Fourier Tr...

7 years ago | 0

Answered

How to read a data file line by line running a loop?

I don't think you should read it line by line. Just read the whole thing, and _process_ it line by line. 1300 rows are peanuts, ...

How to read a data file line by line running a loop?

I don't think you should read it line by line. Just read the whole thing, and _process_ it line by line. 1300 rows are peanuts, ...

7 years ago | 0

Answered

how to exclude above and below of average of min and max peaks?

You can select certain parts of a vector using logical indices. Example: Remove everything > 2 a = [ 1 2 3 4 5 ]; in...

how to exclude above and below of average of min and max peaks?

You can select certain parts of a vector using logical indices. Example: Remove everything > 2 a = [ 1 2 3 4 5 ]; in...

7 years ago | 0

Answered

how to declare parameter data type in a function?

Hi Short answer: cast with e.g. int8 Longer answer: As you probably know, Matlab is quite relaxed when it comes to data...

how to declare parameter data type in a function?

Hi Short answer: cast with e.g. int8 Longer answer: As you probably know, Matlab is quite relaxed when it comes to data...

7 years ago | 0

Answered

How to make a plane rotating with roll, pitch and yaw?

Hi you can use hgtransform objects. _Andrew Gibiansky_ has a simple quadrotor simulator which uses them, you could have a loo...

How to make a plane rotating with roll, pitch and yaw?

Hi you can use hgtransform objects. _Andrew Gibiansky_ has a simple quadrotor simulator which uses them, you could have a loo...

7 years ago | 0

Answered

merging files using for loop

The above method should work. However, instead of copying the content into a string ( which might be HUGE for several files ...

merging files using for loop

The above method should work. However, instead of copying the content into a string ( which might be HUGE for several files ...

7 years ago | 0

| accepted

Answered

Adjacency matrix of a network to Distance matrix (Two -Hop)

Possible solution, see comment section for details: A = [ 0 1 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0 ...

Adjacency matrix of a network to Distance matrix (Two -Hop)

Possible solution, see comment section for details: A = [ 0 1 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0 ...

7 years ago | 0

| accepted

Answered

Finding the Transfer Function of resonance system

There are several ways of doing this, but I'm guessing you would like to actually build the circuit and get the transfer functio...

Finding the Transfer Function of resonance system

There are several ways of doing this, but I'm guessing you would like to actually build the circuit and get the transfer functio...

7 years ago | 1