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# the cyclist

##### Last seen: 3 days ago
4,348 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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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...

3 days ago | 0

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 ...

4 days ago | 1

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...

5 days ago | 0

I suggest you look for code for a similar figure in the MATLAB Plot Gallery.

9 days ago | 0

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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 = ...

9 days ago | 1

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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.

9 days ago | 0

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how to calculate distance euclidean
c(m,n) is the absolute value of the difference between the m-th element of the vector stored in a and the n-th element of the ve...

9 days ago | 0

My is my matrix can't multiply with this vector
Your variables tranposeA and y have sizes 2x4 and 1x4, respectively. It is unclear to me whether you wanted a matrix multiplica...

11 days ago | 0

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How to assemble 3D array from four vectors
Here is one way: G = reshape([FF; MF; FM; MM],2,2,6)

12 days ago | 0

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how to graph using loop?
Put the command hold on on the line after figure. See the documentation for the hold command for details.

12 days ago | 0

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How to arrange indices of a real array ?
Rankig = [ 0.6229 , 0.6516 , 0.2036 , 0.0997 , 0.5986 , 0.5897 , 0.7667 , 0.4887]; [~,Indexes] = sort(Rankig); [~,Indexes2...

13 days ago | 0

How to arrange indices of a real array ?
You are just interpreting the output incorrectly. [B, Indexes] ans = 0.7667 0.6516 0.6229 0.5986 0.5897 ...

13 days ago | 0

Finding unique slices of a multidimensional array
% Define a 3-d array of pretend data, that has a couple duplicate slices % (Use your data instead) rng default A = rand(2,2,4...

14 days ago | 1

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Cell returns different number of rows in a loop - How to align this?
Something like this should help: % Define the old and new phases info phases_old = {'eta';'mu'}; phases_new = {'eta';'mu';'mu...

15 days ago | 0

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How to calculate the slope of select data points across entire dataset?
Here is a straightforward method. I commented the code, so I hope you can follow the algorithm I didn't see how you wanted to c...

24 days ago | 0

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Why do i get tstat Inf after a linear regression?
The root cause is that your model is "perfect". The model is effectively y = b1 + b2*x1 + b3*x2 + b4*x1*x2 which means you hav...

27 days ago | 0

Cross product k(i-2j)
a = [0 0 1]; b = [1 -2 0]; cross(a,b)

1 month ago | 0

Hold on function doesn't work
The problem with your code is not with the hold command. The problem is the syntax to plot the line. You plotted a 1x200 vector ...

1 month ago | 0

Let's step back to the big conceptual picture. The mle function is estimating the most likely parameters for a distribution of s...

1 month ago | 2

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How to show the plot with the highest value?
plot(h,max(abs(T1),abs(T2)))

1 month ago | 0

how to plot only one datapoint at a time with a 1 second delay from a dataset
Here is one way: TestPoints=[1 4 6;2 1 4;3 2 3;4 1 5;5 3 4;6 1 6;7 2 6;8 2 6]; figure for nr = 1:size(TestPoints,1) pl...

1 month ago | 0

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how to make intervals in a bar graph
Here is one way: w = 42.5 : 5.0 : 62.5; n = [4 12 13 6 5]; bar(w,n,'BarWidth',1) FYI, if you have the underlying ind...

1 month ago | 0

How to get a random vector whose elements arrangement is the same as that of my desired vector
Do you want something like this, which adds some random "noise" around the elements of u? u = [3 1 5 105 155 50]; m = 10; n...

2 months ago | 0

Error using plot Not enough input arguments.
If you take a look at the documentation for the plot function, you will see that it cannot take cell arrays as input. I'm not e...

2 months ago | 0

shuffle indexes when sorting matrix
One way that springs to mind is to add a small, random "jitter" to the values in the image. The jitter magnitude should be small...

2 months ago | 1

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How to suppress this error?
Two thoughts: First: Are you certain you have the correct warning? After you run your code that gives the warning, what is the ...

2 months ago | 0

Dot indexing is not supported for variables of this type???
Complete guess here. Are you simply trying to multiply the two variables? If so, then E(i).*tx(rr-1) Just using a dot, by itse...

2 months ago | 0

How to interpret entries in documentation's left pane
In that left-hand pane, the following pages are at the same "level of the documentation hierarchy": Get Started with MATLAB Com...

2 months ago | 1

Probability of Combinations Occurring
By "unique combinations", I assume you mean unique rows. Here is one way: % Example dataset. (Use your data instead.) x = [7 ...

2 months ago | 0