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the cyclist


Last seen: Today
4.372 total contributions since 2011

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.)

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Answered
Calling python using system function
Sounds like a path issue. Type pwd in MATLAB to get your directory, and then go to that directory on the command line and try ...

circa 7 ore ago | 0

| accepted

Answered
need help in confusion matrix details
The green number in the upper-right box is the fraction of correctly classified entries in that row (and the red is the incorrec...

1 giorno ago | 1

| accepted

Answered
How to change my x axis value
It would be helpful if you posted your data, so we know exactly how it is stored (e.g. do you just have the years stored as nume...

11 giorni ago | 2

| accepted

Answered
Why variables are different tha command window values?
In the command window, you seem to be highlighting elements 1323:1325. In the variable window, you seem to be highlighting eleme...

13 giorni ago | 0

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Answered
How can I combine these two MATLAB codes? (MATLAB)
Use the hold command figure hold on plot(t, y2, 'linewidth', 2); plot(t,y,'linewidth',2); and then your other commands for ...

18 giorni ago | 0

Answered
[SOLVED]: I'm getting the error "Array dimensions must match"
I recommend that you use the debugger to investigate. Specifically, set a breakpoint at the line U = F.*(ones(sz) + Beta.* L); ...

18 giorni ago | 1

| accepted

Answered
Why do I get non-zero standard deviation in data with no variability?
Your standard deviaions are zero -- to within the accuracy possible by calculation in floating point numbers. The first referen...

19 giorni ago | 1

Answered
How can I fit data to a system of implicit equations?
I'm pretty sure that this is a really tricky problem to solve, and I am not certain it can be done in MATLAB. (When I say this, ...

19 giorni ago | 0

Answered
how can i determine angle between 2 variables
You got the order of the inputs incorrect. It should be atan2(rAy,rAx)*g This will give a negative answer, measuring the angle...

19 giorni ago | 0

Answered
Not enough input arguments.
How are you calling the function? If you call it like this ... Fillter() then you will get that error because Fillter is expec...

19 giorni ago | 0

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Answered
The logical indices in position 1 contain a true value outside of the array bounds.
You don't give enough information to diagnose why this is happening in your code, but here is an example of that error and how i...

23 giorni ago | 0

Answered
Illegal use of reserved keyword "end"
In the statement s2=[a2(length(a2)) max([a2,a3,a4,a5,a6,a7,a11,a13,a17,a19,a23,a25,a29,a31,a35,a37]); you seem to have missed ...

28 giorni ago | 0

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Answered
i am a beginner matlab user , and i have problem with the number of decimal places , i need to increase them , what should i do ? here is the code , can anyone just edit it to increase the number of decimal places
You can use the format command, e.g. format long Note that MATLAB always stores the result as double precision by default -- y...

circa un mese ago | 0

| accepted

Answered
Using chaotic sequence to generate random numbers
This GitHub repo has a MATLAB implementation. I cannot attest to its quality.

circa un mese ago | 0

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Answered
How can I change this 3-D array(2000,21,80) to 4-D array(1000,20,21,80)?
Did you mean (1000,2,21,80)? If so, then you can use the reshape command: output = reshape(x,[1000,2,21,80]); where x is your ...

circa un mese ago | 0

Answered
finding a value of x for a given y
interp1(y,x,80)

circa un mese ago | 0

| accepted

Answered
Resample from a nonuniform time history while keeping the peak and valley values
There is almost certainly not a built-in function that does this resampling in the exact way you want. Instead, you need to thin...

circa un mese ago | 0

Answered
"Error using plot, Value not a numeric scalar"
The LineWidth parameter should just be the number 2 (without quotes), not the character '2'. After that, you are going to run...

circa un mese ago | 0

Answered
Convert each cell to 4D
The best method to do this might depend on how generalizable you need this to be to other cell arrays (with different internal a...

circa un mese ago | 0

Answered
Fourier transform for a sequence of values
fft(x)

circa un mese ago | 0

Answered
Why can't I use fplot command ?
fplot expects a function as input. I think you want the plot command instead, which expects numerical vector input ... plot(x_t...

circa un mese ago | 1

Answered
Correlation of two variables over time: can this happen?
Yes. This is known as Simpson's Paradox. Here is an example: rng default x1 = [1 2 3 4 6 7 8 9]'; x2 = [1 2 3 4 -6 -5 -...

circa un mese ago | 1

| accepted

Answered
errorbar for x and y
This code works for me. What version of MATLAB are you running? If you have an older version, and cannot update, then you could...

circa un mese ago | 0

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Answered
matrix variable problem in matlab
This documentation about indexing with logical values might help you understand.

circa 2 mesi ago | 0

Answered
I want to solve a problem with just numbers from 0 to 2, how do I do that?
Are you sure you copied everything from the assignment correctly? Can you post the text of the assignment here? I did the Gauss...

circa 2 mesi ago | 0

Answered
how to find index of matrix
It looks like you were checking the wrong columns. row = find (A(:,2)==9 & A(:,3)==5.125) Also, you need to use & rather than ...

circa 2 mesi ago | 1

Answered
Index exceeds the number of array elements
This is not strictly an answer to your question, but I recommend learning how to use the debugger. Then you will be able to pinp...

circa 2 mesi ago | 0

Answered
How to plot this figure? please help me.
I suggest you look for code for a similar figure in the MATLAB Plot Gallery.

2 mesi ago | 0

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Answered
How to reorganize an array given an index
Here is one way: % Inputs array = [1,2,3,4,5,NaN,NaN,NaN]; idx_flag = [1,4,8]; % Get length of array for convenience L = ...

2 mesi ago | 1

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Answered
How can I plot a histogram out of a vector of percentages
I don't think you want a histogram (which would create the percentages from the raw data). I think you just need a bar graph.

2 mesi ago | 0

| accepted

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