879 total contributions since 2009

Professional Interests: Modeling. As in hydrology, not as in Brad Pitt.

Answered

How to "filter" an N-D array with matrix indexing?

data = rand(10,3,3); idx = (1:2:5)'; dims = size(data); to_add = cumprod(dims); for ii = 2:numel(dims) ...

How to "filter" an N-D array with matrix indexing?

data = rand(10,3,3); idx = (1:2:5)'; dims = size(data); to_add = cumprod(dims); for ii = 2:numel(dims) ...

3 years ago | 0

Answered

Help with a piece of code

Generating a "binary" (logical) array: a = rand(10,1) > 0.5; Transforming the binary array into a string. _v_ is a charac...

Help with a piece of code

Generating a "binary" (logical) array: a = rand(10,1) > 0.5; Transforming the binary array into a string. _v_ is a charac...

4 years ago | 0

Answered

poissrnd function issue: weird histogram

The loop is unnecessary: histogram(poissrnd(100,1e6,1),300) Works as expected.

poissrnd function issue: weird histogram

The loop is unnecessary: histogram(poissrnd(100,1e6,1),300) Works as expected.

4 years ago | 1

Answered

Transforming a string of letters into number based on each value equaling a number.

str = 'bccddee'; result = sum(str - 'a' + 1)

Transforming a string of letters into number based on each value equaling a number.

str = 'bccddee'; result = sum(str - 'a' + 1)

4 years ago | 2

Answered

Do one action to multiple arrays

The answer would be a slight adaptation of _"don't use dynamic variable names"_ with the added issue of not being able to use a ...

Do one action to multiple arrays

The answer would be a slight adaptation of _"don't use dynamic variable names"_ with the added issue of not being able to use a ...

4 years ago | 1

Answered

How to get rid of repeating values inside an array

b = a(sum(bsxfun(@eq,a,a'))==1)

How to get rid of repeating values inside an array

b = a(sum(bsxfun(@eq,a,a'))==1)

4 years ago | 1

| accepted

Answered

I'm trying to set certain rows in a 3 dimensional matrix 0

Since it is impossible setting them to empty without actually changing your array, you could use NaN instead. data(10,:,2) =...

I'm trying to set certain rows in a 3 dimensional matrix 0

Since it is impossible setting them to empty without actually changing your array, you could use NaN instead. data(10,:,2) =...

4 years ago | 0

Answered

How can I get values for f in a matrix of dimension(100,1)?

f =@(x,y) (1-x).^2 +100*(y-x.^2).^2; dummy = linspace(-1,1,10); [xx,yy] = ndgrid(dummy,dummy); result = f(xx,yy); ...

How can I get values for f in a matrix of dimension(100,1)?

f =@(x,y) (1-x).^2 +100*(y-x.^2).^2; dummy = linspace(-1,1,10); [xx,yy] = ndgrid(dummy,dummy); result = f(xx,yy); ...

4 years ago | 0

Answered

Finding specfic string within another string

yourStr = '\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST' re = '\\[0-9]{2}\s-\s[a-zA-Z]+'; result = re...

Finding specfic string within another string

yourStr = '\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST' re = '\\[0-9]{2}\s-\s[a-zA-Z]+'; result = re...

4 years ago | 0

Answered

How can I plot a polar plot with varying colour

If you have R2016b or more recent: <http://se.mathworks.com/help/matlab/ref/polarscatter.html>

How can I plot a polar plot with varying colour

If you have R2016b or more recent: <http://se.mathworks.com/help/matlab/ref/polarscatter.html>

4 years ago | 1

Answered

How to run scripts (not functions) with predefined user inputs?

<https://se.mathworks.com/help/matlab/ref/input.html>

How to run scripts (not functions) with predefined user inputs?

<https://se.mathworks.com/help/matlab/ref/input.html>

4 years ago | 1

Answered

Derivative in function handle

If you're gonna do this numerically, you need to specify an interval in which to evaluate. Note that diff doesn't really give th...

Derivative in function handle

If you're gonna do this numerically, you need to specify an interval in which to evaluate. Note that diff doesn't really give th...

4 years ago | 0

Answered

How to create a random gamma distributed vector with a mean of 0.1 and entries between 0 and 1?

The <https://se.mathworks.com/help/stats/gamrnd.html gamma distribution> takes two parameters: the shape and the scale. The mean...

How to create a random gamma distributed vector with a mean of 0.1 and entries between 0 and 1?

The <https://se.mathworks.com/help/stats/gamrnd.html gamma distribution> takes two parameters: the shape and the scale. The mean...

4 years ago | 1

| accepted

Answered

If I am given coordinates of three points, how can I plot an arc using those 3 points in matlab?

<https://se.mathworks.com/matlabcentral/fileexchange/57668-fit-circle-through-3-points>

If I am given coordinates of three points, how can I plot an arc using those 3 points in matlab?

<https://se.mathworks.com/matlabcentral/fileexchange/57668-fit-circle-through-3-points>

4 years ago | 0

Answered

Function not supported for code generation

You can't. It's up to the Mathworks to decide which functions to include. You could always ask them nicely. I don't kno...

Function not supported for code generation

You can't. It's up to the Mathworks to decide which functions to include. You could always ask them nicely. I don't kno...

4 years ago | 0

Answered

how to not exceed limits of the matrix column

your_array = rand(10,16) %looping through all columns for ii=your_array %ii now contains all values in column end

how to not exceed limits of the matrix column

your_array = rand(10,16) %looping through all columns for ii=your_array %ii now contains all values in column end

4 years ago | 0

| accepted

Answered

how to density plot of a scatter plot?

<https://se.mathworks.com/help/matlab/ref/histogram2.html |histogram2()|>

how to density plot of a scatter plot?

<https://se.mathworks.com/help/matlab/ref/histogram2.html |histogram2()|>

4 years ago | 0

Answered

Various inputs and outputs in functions

You could pass a structure to your function. The structure could contain whatever flags and arguments you need. Same goes for th...

Various inputs and outputs in functions

You could pass a structure to your function. The structure could contain whatever flags and arguments you need. Same goes for th...

4 years ago | 0

Answered

How can I get a vector out of a matrix?

Sounds like a job for <https://se.mathworks.com/help/matlab/ref/sub2ind.html |sub2ind()|>

How can I get a vector out of a matrix?

Sounds like a job for <https://se.mathworks.com/help/matlab/ref/sub2ind.html |sub2ind()|>

4 years ago | 0

Answered

How do I exclude NaN values when calculating mean of each row in a matrix?

y = nanmean(a,2)

How do I exclude NaN values when calculating mean of each row in a matrix?

y = nanmean(a,2)

4 years ago | 1

Answered

I want to obtain number of cases(matrix's length) . By applying same sum in any matrix. (on constraints)

If what you mean is that you want the sum of a random array of four elements to be thirty with some condition placed on the last...

I want to obtain number of cases(matrix's length) . By applying same sum in any matrix. (on constraints)

If what you mean is that you want the sum of a random array of four elements to be thirty with some condition placed on the last...

4 years ago | 0

Answered

What is the use of state in randseed() function?

Random numbers in Matlab are not random. They are pseudo-random: they are based on deterministic algorithms. You can consider...

What is the use of state in randseed() function?

Random numbers in Matlab are not random. They are pseudo-random: they are based on deterministic algorithms. You can consider...

4 years ago | 0

Answered

I unable to run my program.Please help me...

custlogpdf =@(x,d,r) log(factorial(r+x-1)/(factorial(x)*factorial(r-1))+ log(s1));

I unable to run my program.Please help me...

custlogpdf =@(x,d,r) log(factorial(r+x-1)/(factorial(x)*factorial(r-1))+ log(s1));

4 years ago | 0

Answered

Why does == not work with decimal indexed for loop?

From the documentation: _"x = j:i:k creates a regularly-spaced vector x using i as the increment between elements. The vector...

Why does == not work with decimal indexed for loop?

From the documentation: _"x = j:i:k creates a regularly-spaced vector x using i as the increment between elements. The vector...

4 years ago | 1

| accepted

Answered

Check for identical maximum values in an array

Number of maximum values: numMax=sum(A(:) == max(A(:))); if numMax > 1 %Do your thing end

Check for identical maximum values in an array

Number of maximum values: numMax=sum(A(:) == max(A(:))); if numMax > 1 %Do your thing end

4 years ago | 1

Answered

Replot a matlab.graphics.chart

Not sure this is what you mean: numPlots = 10; lH = cell(1,numPlots); for ii = 1:numPlots hold on; ...

Replot a matlab.graphics.chart

Not sure this is what you mean: numPlots = 10; lH = cell(1,numPlots); for ii = 1:numPlots hold on; ...

4 years ago | 0

Answered

what can be maximum number number of alphabet in name of model ?

From the documentation: _"Model Names:_ _Model file names must start with a letter and can contain letters, numbers, and u...

what can be maximum number number of alphabet in name of model ?

From the documentation: _"Model Names:_ _Model file names must start with a letter and can contain letters, numbers, and u...

4 years ago | 0

| accepted

Answered

How to change the output file name with the same input file name but with a different extension ?

old = 'BOB_LEHAR_CS_2013112718_TRMM.nc'; new = regexprep(old, '\.[^.]+$', '.grd')

How to change the output file name with the same input file name but with a different extension ?

old = 'BOB_LEHAR_CS_2013112718_TRMM.nc'; new = regexprep(old, '\.[^.]+$', '.grd')

4 years ago | 0

Answered

Turning x amount of data points in to 100 to get a percentage

If you have the signal processing toolbox: <https://se.mathworks.com/help/signal/ref/resample.html>

Turning x amount of data points in to 100 to get a percentage

If you have the signal processing toolbox: <https://se.mathworks.com/help/signal/ref/resample.html>

4 years ago | 0

| accepted

Answered

How much is (in kms) 1 degree of Longitude in the Earth?

<https://se.mathworks.com/help/map/ref/deg2km.html> Or perhaps: <https://se.mathworks.com/help/map/ref/stdist.html> pro...

How much is (in kms) 1 degree of Longitude in the Earth?

<https://se.mathworks.com/help/map/ref/deg2km.html> Or perhaps: <https://se.mathworks.com/help/map/ref/stdist.html> pro...

4 years ago | 0