the cyclist

3,876 total contributions since 2011

Data scientist at Cohen Veterans Bioscience; Obsessive runner. Professional Interests: Predictive modeling, statistics.

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Answered
How to plot outliers from mean
There are three steps: Create an algorithm to define the outliers Identify the points that meet that definition Plot those po...

14 hours ago | 0

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Answered
Function with euler not working properly
The images you posted don't show up for me, either. Your code ran for me, and yielded this figure: I think you might have wa...

16 hours ago | 0

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Answered
Comparing elements of a vector.
[g(:,2), idx] = unique(R); g(:,1) = T(idx);

3 days ago | 0

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Create lookup table for cell array
Is this what you want? [num2cell(1:9)' Codeword(:)]

3 days ago | 0

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Answered
Check all values in a table if any is "NAN"
This may work for your case tbl = fillmissing(tbl,'constant',1); assuming the NaNs are the only values that count as missing f...

4 days ago | 0

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Need help creating an matrix that includes probability
There are many ways to generate pseudorandom numbers in MATLAB. Since this sounds like homework, I'll just point you to this doc...

5 days ago | 0

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Plot two arrays as x and y and select the maximum point
The first thing is trivial ... plot(V,M,'.') I don't understand what you mean by "maximize both" or "do it graphically".

5 days ago | 0

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Answered
Computing determinant of matrix A using LU factorization
If I use the lu function from MATLAB (instead of your lufact function), I get the expected result. So, I'd double-check your LU ...

5 days ago | 0

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Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses
I've spotted two errors so far. (1) Where you have 0.5th where you presumably want 0.5*th (2) In that same line, you typo'e...

5 days ago | 0

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convert string to number or array
I'm guessing it's the space that is causing the problem. Run your array through x = regexprep(x,' ',''); first to remove the s...

5 days ago | 1

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Answered
Scatter3: How can I change the size of a particular marker?
This puzzled me for a bit -- until I read the documentation a bit more carefully. For scatter3, the marker size specified is th...

6 days ago | 0

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Answered
Using two vectors to get the third one
This is virtually equivalent to Fangjun's solution. But it uses some intuitive variable names (and comments) to help you underst...

6 days ago | 1

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Index exceeds the number of array elements (5)
You have initialized x and y to be vectors of length 5. But in your for loop, i reaches the value value 5, and then you try to a...

6 days ago | 0

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Answered
Plot function is not working
Your plotting code is trying to select just one element from the t and y vectors. I think you want this instead: plot(t,y) (I...

6 days ago | 0

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Answered
Passing array as an input argument
Is that how you are calling the function, or is it the function header (inside the function file itself)? If that is how you ar...

6 days ago | 0

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Answered
How to draw a star in matlab
There are two places in your code where you wrote 6pi instead of 6*pi Assuming you are using the MATLAB editor, you should s...

6 days ago | 0

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how to solve equation without values
I suggest you read the documentation about simplifying symblic expressions for the Symbolic Math Toolbox.

7 days ago | 0

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For loop with multiple arrays
You don't need a loop: % These are tot defined in your code, so I made up some numbers max_speed = 180; Rho_fuel = 1; Powe...

7 days ago | 0

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How to plot unitstep function??
I think you want to enclose these terms exp(-3*t) - exp(-6*t) in parentheses, so that they are both multiplied by the heavisid...

7 days ago | 0

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Get correlation between segments of two matrix
% Some made-up data matrix1 = randn(2325,25); matrix2 = randn(2175,25); % Define the segment size, for generality segment ...

7 days ago | 0

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Answered
'Dimensions of arrays being concatenated are not consistent' when using isequal
What sizes are updated1 and dist1 (and the other pair)? [updated1, dist1] is a horizontal concatenation.

8 days ago | 0

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Answered
Efficiently add missing parts to the table
I don't work with tables much, and this is a bit awkward, but it should work: % Make up a bit of pretend data, and create a tab...

8 days ago | 0

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Answered
How to create groups by using labels?
Here is one way: V = [ 1 2 3 4 5 6 7 8]; L = { 'A', 'A', 'A', 'C', 'C', 'C', 'A', 'B' }; [tf,loc] = ismember(L,unique(L)); ...

8 days ago | 1

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Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values.
Just a guess, but I think you probably named a variable dot, which is being used instead of the function you want. What does w...

9 days ago | 0

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Answered
group equal value in array
If you get the RunLength utility from the File Exchange, it will give you the output vector you want and the counts, in one func...

9 days ago | 0

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array exceeds maximum array size preference.
In this line of code t = [0:10^20]; You are trying to create a vector that is length 10^20. That is ... uh ... big. If I did ...

9 days ago | 0

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creating graphs from loops
Here is one way that I typically solve that: mrange = 60:70; mcount = numel(mrange); y1 = zeros(mcount,1); y2 = zeros(mc...

9 days ago | 0

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How do i get my textbox to display the given value of my variable??
I'm guesing that dis(score(1)) is a variable you are trying to display. You need to convert that to a string -- just putting q...

9 days ago | 0

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Answered
Generate random numbers from a vector
Here's one way: A(randi(numel(A)))

9 days ago | 0

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Answered
glmfit returns p-value as NaN
Thanks for uploading the data and your code. You have a couple major problems. One problem is immediately clear: the variable ...

10 days ago | 0