Data scientist at Cohen Veterans Bioscience; Obsessive runner. Professional Interests: Predictive modeling, statistics. (I don't respond to email via author page, but will usually look at a question if you send me a link to it.)

Answered

set default line marker symbol

See this answer from Mathworks support.

set default line marker symbol

See this answer from Mathworks support.

environ 9 heures ago | 0

Answered

how to find the Reverse process of A(B).

C = [9 4 2 1 7 6 8 5 3 8 11]; A(B) = C

how to find the Reverse process of A(B).

C = [9 4 2 1 7 6 8 5 3 8 11]; A(B) = C

environ 18 heures ago | 1

Answered

How do I find the column of maximum values of a maxtrix?

Here is one way to do it. [~,linearIndex] = max(x,[],'all','linear'); % First, find the *linear* index of x [rowIndex,colIndex...

How do I find the column of maximum values of a maxtrix?

Here is one way to do it. [~,linearIndex] = max(x,[],'all','linear'); % First, find the *linear* index of x [rowIndex,colIndex...

1 jour ago | 0

Answered

How can I do polynomial fitting when X-axis is time

Hm. Plotting the data you posted, using the seconds function, results in exactly what I would expect -- including capturing the ...

How can I do polynomial fitting when X-axis is time

Hm. Plotting the data you posted, using the seconds function, results in exactly what I would expect -- including capturing the ...

1 jour ago | 0

Answered

Get the diagonal without calculating the explicit matrix

Here is one way: % Make up some inputs N = 4; B = rand(N); C = rand(N); % Calculate the diagonal A_diag = 0; for nr = 1...

Get the diagonal without calculating the explicit matrix

Here is one way: % Make up some inputs N = 4; B = rand(N); C = rand(N); % Calculate the diagonal A_diag = 0; for nr = 1...

2 jours ago | 1

Answered

Find the sum of the vector using a for loop

If you type the expression 50:1 into MATLAB, you will get the result >> 50:1 ans = 1×0 empty double row vector So, y...

Find the sum of the vector using a for loop

If you type the expression 50:1 into MATLAB, you will get the result >> 50:1 ans = 1×0 empty double row vector So, y...

3 jours ago | 0

Answered

Index exceeds the number of array elements (1)

You didn't answer Ameer's first question, but it seems clear that when you call the function diggerangle(L_12, L_23, L_13, x) %...

Index exceeds the number of array elements (1)

You didn't answer Ameer's first question, but it seems clear that when you call the function diggerangle(L_12, L_23, L_13, x) %...

3 jours ago | 1

Answered

How to write a custom non linear function for data fitting?

I don't have the Curve Fitting Toolbox, so I can't really comment on your current code. But, if you also have the Statistics and...

How to write a custom non linear function for data fitting?

I don't have the Curve Fitting Toolbox, so I can't really comment on your current code. But, if you also have the Statistics and...

5 jours ago | 1

Answered

Plot and fit exponential decay probability of population

You are correct to use the ecdf function. I think the piece you are missing is the use of the 'censoring' input. Take a look at ...

Plot and fit exponential decay probability of population

You are correct to use the ecdf function. I think the piece you are missing is the use of the 'censoring' input. Take a look at ...

5 jours ago | 0

| accepted

Answered

matlab gives wrong answer to determinant of a 3x3 matrix

MATLAB gives the correct result to within the limits of double-precision floating-point arithmetic. This is a very common quest...

matlab gives wrong answer to determinant of a 3x3 matrix

MATLAB gives the correct result to within the limits of double-precision floating-point arithmetic. This is a very common quest...

6 jours ago | 1

Answered

How do I print unknown values

vectorA = [2 3 5 7]; ['Vector A is: [',sprintf('%6.3f', vectorA),']']

How do I print unknown values

vectorA = [2 3 5 7]; ['Vector A is: [',sprintf('%6.3f', vectorA),']']

6 jours ago | 0

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Answered

How to fit multiple peaks using Gaussian funtion

Never this the original of this question, but saw the comment. If you have the Statistics and Machine Learning Toolbox, I belie...

How to fit multiple peaks using Gaussian funtion

Never this the original of this question, but saw the comment. If you have the Statistics and Machine Learning Toolbox, I belie...

6 jours ago | 0

Answered

Hyerbolic Functions causing issues with Contour Plots.

I ran the following code k = 0.5; l = 0.5; k1=((k+(1/2))*pi)^4; l1=((l+(1/2))*pi)^4; v1 = @(x,y) cos(k1*x)-cosh(k1*x)-(...

Hyerbolic Functions causing issues with Contour Plots.

I ran the following code k = 0.5; l = 0.5; k1=((k+(1/2))*pi)^4; l1=((l+(1/2))*pi)^4; v1 = @(x,y) cos(k1*x)-cosh(k1*x)-(...

7 jours ago | 0

Answered

make rectangular with vectors

You say that you have a problem with "one" of your lines, but I think you have a deeper conceptual problem with how you tried to...

make rectangular with vectors

You say that you have a problem with "one" of your lines, but I think you have a deeper conceptual problem with how you tried to...

8 jours ago | 1

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Answered

what is wrong with my code, i am trying to plot below

FYI, there is a much more efficient solution, which is to avoid the for loop altogether: t = 1:.01:10; x = zeros(size(t)); ...

what is wrong with my code, i am trying to plot below

FYI, there is a much more efficient solution, which is to avoid the for loop altogether: t = 1:.01:10; x = zeros(size(t)); ...

8 jours ago | 0

Answered

what is wrong with my code, i am trying to plot below

In every iteration of the for loop, you are simply overwriting x, over and over. Instead, you need to define a vector for x, to...

what is wrong with my code, i am trying to plot below

In every iteration of the for loop, you are simply overwriting x, over and over. Instead, you need to define a vector for x, to...

8 jours ago | 0

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Answered

whats wrong with my code?

He wrote dx = [0]; and you wrote dx[0];

whats wrong with my code?

He wrote dx = [0]; and you wrote dx[0];

8 jours ago | 1

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Answered

Save image containing plotted lines

I would expect print('-dpng','-r600','HoughLines.png') to work. You could also try the export_fig utility from the File Excha...

Save image containing plotted lines

I would expect print('-dpng','-r600','HoughLines.png') to work. You could also try the export_fig utility from the File Excha...

9 jours ago | 0

Answered

How to save any trained machine learning model to use it for prediction later?

The standard calling syntax, e.g. Mdl = fitrensemble(Tbl,ResponseVarName); stores everything you need in the model object name...

How to save any trained machine learning model to use it for prediction later?

The standard calling syntax, e.g. Mdl = fitrensemble(Tbl,ResponseVarName); stores everything you need in the model object name...

9 jours ago | 0

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Answered

Perform inverse of each double within a cell

Why do you think you cannot use cellfun? Period = {[2 3; 5 7],[11 13]}; Frequency = cellfun(@(x)1./x,Period,'UniformOutput',...

Perform inverse of each double within a cell

Why do you think you cannot use cellfun? Period = {[2 3; 5 7],[11 13]}; Frequency = cellfun(@(x)1./x,Period,'UniformOutput',...

10 jours ago | 0

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Answered

factoran Error, "Some columns of the X matrix are constant."

You've asked questions about three errors: some columns of the X matrix are constant the number of factors requested, M, is to...

factoran Error, "Some columns of the X matrix are constant."

You've asked questions about three errors: some columns of the X matrix are constant the number of factors requested, M, is to...

10 jours ago | 0

Answered

How can I generate a random number from a chi square distribution?

If you have the Statistics and Machine Learning Toolbox, you can use the randsample command to do weighted probabilities. In the...

How can I generate a random number from a chi square distribution?

If you have the Statistics and Machine Learning Toolbox, you can use the randsample command to do weighted probabilities. In the...

12 jours ago | 0

Answered

how to plot cosx*coshx+1=0

I don't have the Symbolic Math Toolbox, so I can't comment on your code. But this worked for me. f = @(x) (cos(x)).*(cosh(x))+1...

how to plot cosx*coshx+1=0

I don't have the Symbolic Math Toolbox, so I can't comment on your code. But this worked for me. f = @(x) (cos(x)).*(cosh(x))+1...

12 jours ago | 0

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Answered

Which paper should be cited for the genetic algorithm used in Matlab 2019a

One source of references is the documentation for the function (which I'm guessing is where you found the reference you have). ...

Which paper should be cited for the genetic algorithm used in Matlab 2019a

One source of references is the documentation for the function (which I'm guessing is where you found the reference you have). ...

15 jours ago | 0

Answered

Sparse matrix re-ordering

I tried to generalize your code as follows. A = [-1 -2 0 4 0 0 0 1 0 0; 3 2 0 0 0 0 -4 0 0 3; 0 0 5...

Sparse matrix re-ordering

I tried to generalize your code as follows. A = [-1 -2 0 4 0 0 0 1 0 0; 3 2 0 0 0 0 -4 0 0 3; 0 0 5...

15 jours ago | 0

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Answered

Scatter and line problem

This code illustrates everything you asked about. % Fix the random number seed, for reproducibility rng default % Data x=[...

Scatter and line problem

This code illustrates everything you asked about. % Fix the random number seed, for reproducibility rng default % Data x=[...

16 jours ago | 0

| accepted

Answered

Error with exponential term

You could type format long before running that code, or use the sprintf command to display the result. Looks like Kg1 is 0 to...

Error with exponential term

You could type format long before running that code, or use the sprintf command to display the result. Looks like Kg1 is 0 to...

17 jours ago | 0

Answered

Convert a cell array into matrix, but with just removing the commas (Need words to stay)

NF_array = [{'1, known, known, 0.0, 0.0'}, ... {'8, known, known, 0.0, 0.0'}, ... {'4, free, known, 0.0, 0.0' }, ... ...

Convert a cell array into matrix, but with just removing the commas (Need words to stay)

NF_array = [{'1, known, known, 0.0, 0.0'}, ... {'8, known, known, 0.0, 0.0'}, ... {'4, free, known, 0.0, 0.0' }, ... ...

17 jours ago | 0

| accepted