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the cyclist


Alden Scientific

Last seen: Today Active since 2011

Head of Modeling and Statistics at Alden Scientific. 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.)

Programming Languages:
Python, R, MATLAB, SQL
Spoken Languages:
English

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Answered
Check whether values of a certain column of a matrix is between two values
OK, still trying to understand everything, but I think this does what you want: % Sample input BUS(:, 8) = [2;2;2]; BUS(:,12)...

1 day ago | 0

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Answered
Check whether values of a certain column of a matrix is between two values
I think you intended volmax<0 & volmin <0 rather than volmax<0 | volmin <0 because you want to meet both conditions ("AND"),...

2 days ago | 0

Answered
Select only determined rows in a matrix
% First matrix A = rand(200,2); % New matrix B = A(10:10:end,:); % This will start with the 10th row. You could do B = A(1:...

3 days ago | 0

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Answered
I need to find the the value of one variable against the other How can I do that ?
You can use the interp1 function: % Input data A = [5464.8 9075.5]; B = [0 1]; % Some new value of B: B_new = 0.7; % I...

4 days ago | 0

Answered
How can i make a dinamic row in a matrix or a cell?
In MATLAB, there cannot be an "empty" spot in a numerical array. So, you need to decide what you want in that spot. Sometimes a ...

4 days ago | 1

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Answered
Error this answer is NaN, in my runge-kutta code
Your code is long and complicated. It also has lots of unnecessary complication in it. For example, instead of Lambda1 = zeros(...

4 days ago | 1

Answered
Repeated Measure ANOVA 2x2
I have experience building mixed effects models in MATLAB, but I have not used ANOVA (repeated measures or otherwise). Therefore...

4 days ago | 1

Answered
Show temperature difference (delta) between 2 temps in a graph
Here is an example similar to what posted in my comment, but added line and text: rng default x = rand(1,5); mean_x = mean(...

4 days ago | 0

Answered
how to combine two array of cells into one cellwise
A={ [2,3 ; 2,7] [3,2 ;3,4 ;3,8] [4,3 ; 4,5] [5,4 ; 5,10] }; B={ [2,3,4 ; 2,3,8 ; 2,7,8 ; 2,7,12] [3,2,7 ; 3,4,5 ; 3,8,7] [4...

5 days ago | 0

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Answered
Sorting numbers randomly in a specified range without changing their positions
% Input A = [5 8 8 4 0 0 10 10 2 2]; % Find the pool of numbers that are available to fill % (because they don't appear in ...

6 days ago | 0

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Answered
Random matrix with no repeats in rows and columns.
I believe this does what you want. % Set the random number seed, for reproducibility rng default % The pool of random numbe...

6 days ago | 1

Answered
Adjusting the legend spacing
Not directly answering your question, but a different (and more conventional) approach would be to move the limit annotations ou...

6 days ago | 0

Answered
How to multiply row of matrix A with column of matrix B?
If @Adam Danz is correct that you actually want to multiply all the elements of one column of A with one row of B, then % Defin...

7 days ago | 0

Answered
Swapping my matlab student licence over
You need to deactivate the installation on the old computer.

7 days ago | 0

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Answered
Why does it give me a problem stating that, Index must not exceed 1?
When you define del_ZS1 in the initial for loop, it is not a vector. It is a single, scalar value. When you try to do del_ZS1(...

7 days ago | 0

Answered
How do can I use every number in my loop?
% Set the random number seed, for reproducibility rng default % Create the x data x = rand(3,5); % Mean of all the x dat...

7 days ago | 0

Answered
How to get the indices from a matrix and apply it to vectors?
Here is how you can do that, using my small example: rng default HIGH_WIND = 0.96; % <------ CHANGE THIS TO 15 lat = ran...

8 days ago | 0

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Answered
My plot is not showing a line?
Here is a modified version of your code, where I changed Time to t (in the assignment of S), and I plotted your data as large in...

9 days ago | 0

Answered
How to make the color of the filled part transparent
Use the FaceAlpha property, with a value near zero: figure ax1 = axes; ax2 = axes; x=linspace(1,10,10); y=sin(x); plot(ax2...

11 days ago | 0

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Answered
Not enough input arguments
You need real(ym) instead of real (ym)

11 days ago | 0

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Answered
How can i define a m by n symbolic matrix?
Matrices where the size is not predetermined cannot be defined in MATLAB. Source: this question/answer and the one it points to....

12 days ago | 0

Answered
How do I round this datetime to the nearest 0.1 second?
This is awkward, but it works. Guessing there is a better way. % Define original datetime input dt = datetime('01-Oct-2020 04:...

13 days ago | 0

Answered
problem looping through arrays
I think you intended if mod(M(i,j),2) == 0 rather than if mod(Q(i,j),2) == 0 Regarding the warning about Q changing size, yo...

14 days ago | 0

Answered
Writing a function for the h-index
My understanding of h-index comes from publishing, for example this definition. If M is your data matrix, already sorted, then ...

15 days ago | 0

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Answered
Check for incorrect argument data type or missing argument in call to function 'dateshift'.
I get the error from your first statement as well: % This statement would give an error % dateshift('17:03:41', 'start', 'hour...

15 days ago | 0

Answered
Finding x value for y values on a dataset.
The algorithm you want is not perfectly clear, and I can't see quite how you get the output from your input. But it seems that y...

15 days ago | 1

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Answered
not enough input arguments( not what you think)
How are you calling this function? I put your function in a file named beam.m, then called it from the Command Window using be...

15 days ago | 1

Answered
Colon Notation Function using Matrices
A(2,2:3) means "the 2nd row, 2nd-through-3rd column of A". B(:,2) means "all rows, 2nd column of B". I strongly recommend th...

15 days ago | 0

Answered
How do I sum a vector (row) to a matrix?
A=[1 0 0 1; -1 0 1 1; 1 1 1 1]; B=[1 2 2 1]; A(1,:) = A(1,: ) + B

16 days ago | 0

Answered
Why I cannot exit the for cycle with the "z" counter?
It looks your syntax is correct for what you are trying to do, and the if statement is correctly placed. My best guess is that ...

16 days ago | 0

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