Community Profile # the cyclist

Last seen: Today Active since 2011

Obsessive runner. Flâneur. 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.)

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Issue using Mann-Kendall Test
You have NaT values in your timetable. When I removed them with FM1(isnat(FM1.Var2),:) = []; the code ran to completion.

2 hours ago | 0

Is there a way to overlay one mask onto another?
I don't really do image processing, but I think this straightforwardly answers your question, using only base MATLAB commands. T...

4 hours ago | 0

Plotting different figures by means of for loop
I believe this does what you are trying to do: % Create some fake data [Use your real data instead] m = 5; C = cell(3,4); C ...

1 day ago | 0

matlab not plotting graph
You are using a matrix division operation rather than an elementwise division. So you need, h = [2,4,6,8,10]; x = 10.1; y = 2...

2 days ago | 0

Numerical function invalid expression
You need the explicit multiplication sign 2*x: h=@(x)exp(2*x).*tan(x)./x.^3 You might also want to put in some parentheses ins...

2 days ago | 1

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Find indices in 2D Matrix
Is this what you mean? (I made the matrices smaller, just to show the result.) A = rand(5,2)>.3; B = rand(5,2); newmatrix =...

6 days ago | 0

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Efficient way to multiply a vector of size (Nx,1) with a matrix of size (Nx+1,Nx+1)
If you permute gamma to be a vector along the dimension 3, then you can multiply it by identy, and the result will be a 33x33x32...

7 days ago | 1

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Meaning of box plot notches
The value 1.57 is not something that "MATLAB chose", but rather is directly out of the original research paper that introduced t...

10 days ago | 0

Regression/ Ordinary Least squares on a custom equation
It's definitely an interesting modeling problem. Here is a plot of your data, where I used errorbar to plot the mean and error o...

10 days ago | 0

Element wise cell division
Your code is producing the correct result. You could also have used the cellfun() function to do this operation in one line: A ...

11 days ago | 2

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how do I find at which sample on the x-axis I have maximum value of y-axis?
If you use the two-output syntax for the max() function, the second output is the index of the maximum: clear all clc set(0,'...

12 days ago | 0

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How to plot successive rows of a table when value is true
This line of code for ii=1:ra-1 is looping over all rows except for the last one, so it never "sees" the last row. Therefore, ...

14 days ago | 0

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How to create bar graph with portions (multi-dimensional)?
This example from the documentation shows exactly how to do it. y = [2 2 3; 2 5 6; 2 8 9; 2 11 12]; ba...

15 days ago | 0

How to obtain confidence level and coefficient of determination?
tsreg is not a MathWorks function. Are you using this code from the File Exchange? Obviously, the author of that code has not p...

28 days ago | 0

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Inverse of a cell array
Do you mean you want the reciprocal of each element of each matrix? (That is not what the inverse of a matrix means.) If so, th...

29 days ago | 1

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How to rearrenge function with inputs given?
Option 1 You could do something that is GUI-driven, where the user enters values into textboxes that you have labeled as accel...

29 days ago | 0

could anyone help me how to generate some of the similar values using rng
Here is a new answer, based on the comments on the other answers. numberTotal = 8; % You can change this to 1000 numberRepeat...

29 days ago | 0

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could anyone help me how to generate some of the similar values using rng
In response to the comment in my other answer, here is a pretty simple way to do it: numberRep = 3; % You can change this to 80...

1 month ago | 0

could anyone help me how to generate some of the similar values using rng
Is this what you mean? rng default % for reproducibility, if desired [repmat(rand(),1,3) rand(1,2)]

1 month ago | 0

New variables after computing Principal Components Analysis
Yes, the output score is the observed values of the variables in the principal coordinate axes. I wrote a detailed answer to th...

1 month ago | 0

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How do I integrate the triple integral square root of 4-x^2-y^2-z^2 from 0,1,0,1,0,1?
f = @(x,y,z) sqrt(4 - x.^2 - y.^2 - z.^2); q = integral3(f,0,1,0,1,0,1)

1 month ago | 0

Gaussian Curve Plotting Issues
Can you be more specific what you mean by "the current gaussian curve is very wrong"? Do you mean with the lines connecting all ...

1 month ago | 0

I need to calculate invers of a non square large symbolic matrix
Non-square matrices do not have inverses. You can calculate the pseudoinverse using pinv.

1 month ago | 0

Implementation of connected components analysis using matlab
Did you think to google "matlab connected components"? Literally the first hit is this MATLAB function. I hope that helps.

1 month ago | 0

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Problem by using str2double with csv file
The issue is that your input file uses commas as the decimal separator, rather than a period ("decimal point"). This means that ...

1 month ago | 0

Having issues producing bar chart
I assume you got error from this line: xlabel(Animal ID''s') You have mismatched single quotes, i.e. "unbalanced delimiters", ...

2 months ago | 0

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How to sort a cell array based on the first row?
Out of curiosity, is there some reason you are using a cell array rather than a numeric array to store these numeric data? % Or...

2 months ago | 0

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How can a 4 element array index pull stored string values?
Can you upload examples of your variables fourElementVector and HexData, in a MAT file? This would be helpful. But it seems fro...

2 months ago | 1

How to select all rows of a given column in a cell array
Your syntax: T{1}{:,4} would work if the contents of T{1} were also a cell array, since you would use the curly brackets to ac...

2 months ago | 1

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