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# the cyclist

##### Last seen: Today
4,028 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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Cannot use datetime function on {'01 Nov 2019 14:39:50.365'}
s = '01 Nov 2019 14:39:50.365'; datetime(s,'InputFormat',"dd MMM yyyy HH:mm:ss.S")

3 days ago | 0

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Question

How to determine the x-axis positions of the bars in a grouped bar chart
Suppose I make the following bar chart: figure; bar([1 2],[3 4; 5 6]) How can I programatically find the x-axis locations of e...

9 days ago | 3 answers | 0

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fitting a dual exponential function using nlinfit
I made up some pretend data that looks a little bit like yours, and did your fit. Here is my code: % Make up some pretend data ...

9 days ago | 0

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how to change the box width in boxplot?
You chose the "compact" plot style. Do you prefer this version, which is the default (non-compact)? Also, are you sure you ar...

15 days ago | 0

Array indices must be positive integers or logical values
In this line: hfuncval(k) = hfuncval(k-1); in the first iteration of the for loop, k == 1, so you are attempting to access the...

15 days ago | 0

How to specify histogram's x and y axis
You can use the xlim and ylim commands.

16 days ago | 1

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Plotting estimates (fixed effects) of a linear mixed-model
I could find no mention in the documentation of the LinearMixedModel class that there is an equivalent object function or method...

16 days ago | 1

how to convert to matlab from fortran
You could try f2matlab. It might not get you all the way to the final code you need, but it will probably help.

29 days ago | 0

using function to remove elements from a large matrix
idxToKeep = ismember(M(:,2),[1,2,3,11,12]); M = M(idxToKeep,:);

29 days ago | 0

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Creating all possible combination of 0 and 1 in 2D array
Did you mean you just want each possible unique row, rather than each possible unique matrix? justRows = dec2bin(0:2^m-1)-'0' ...

29 days ago | 0

Creating all possible combination of 0 and 1 in 2D array
% Example choice of m and n n = 2; m = 3; allCombos = reshape(dec2bin(0:2^(n*m)-1)-'0',n,m,[]); allCombos is a 3-dimension...

30 days ago | 2

how to rename and Copy Zip File from one location to another location
I think you should be able to first use the movefile command to rename the other file.

30 days ago | 0

Where is the Compliant Joint Toolbox ?
Let me Google that for you. Looks like it is here.

1 month ago | 0

Storing the results from a loop using tool box functions in a new matrix
I think instead of [lab] = xyz2lab(XYZ,'d65_64') using lab(col,:) = xyz2lab(XYZ,'d65_64') should do what you want

1 month ago | 0

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8 coin toss problem
If you have the Statistics and Machine Learning Toolbox, then v = binopdf(0:8,8,0.5)

1 month ago | 0

In an admittedly quick search, I could not find this info specifically, but the System Requirements page might be helpful.

1 month ago | 0

How to find and replace stand alone values in a logical array
I think this does what you want: a(strfind([1 a 1],[1 0 1])) = 1; a(strfind([0 a 0],[0 1 0])) = 0;

1 month ago | 2

How to convert fraction form to decimal form?
I think you want to use the subs command.

1 month ago | 0

Setting array indices to a vector of values
You can use sub2ind command to convert the subscripted indices (xVal,yVal) into a single linear index into the array.

1 month ago | 0

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CAN I use matlab in two different computers

1 month ago | 0

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Subscript indices must either be real positive integers or logicals.
In this line: np = find(kp > 1.05 & kp <1.2); there are no values of kp that satisfy this condition, so np is empty. That car...

1 month ago | 0

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Multiplying a string with 1 or 0
Here is one way: c = ['A', repmat('+B',Check_B)]; Be aware that you are actually working with character arrays, not strings.

2 months ago | 0

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inserting vectors into another new vector
Here is another way: A = [7 17 27 35]; B = [13 22 30 31]; C = [A; [B nan(numel(A)-numel(B),1)]]; C = C(1:(numel(A)+numel(B...

2 months ago | 1

I keep getting the error "Array indices must be positive integers or logical values?"
In expressions like this one k2(x2(n,:)-x1(n,:)) MATLAB is trying to index into the variable k2. You need to put in the multip...

2 months ago | 1

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Making the Y-axis a scale of a specific variable
Here is one way: r = 7; m = 50; N = 50; x = rand(N,1); y = m*rand(N,1); figure plot(x,y,'.'); set(gca,'YTick',0:r:ma...

2 months ago | 0

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how to estimate the distribution of a random variable knowing the histogram?
Do you have the underlying data, or only the counts from each bin? Were you hoping to find a particular functional form (e.g. a...

2 months ago | 0

Index exceeds the number of array elements (0)
Everywhere that you wrote zeros(i:1) I think you meant zeros(i,1)

2 months ago | 0

Curve Fit data using FIT
I used nlinfit from the Statistics and Machine Learning Toolbox. Here is the code, and the resulting plot: xy = [ ... 1 317.3...

2 months ago | 0

Extracting certain values from a cell array with nth columns containing double arrays
mC = cellfun(@(x)max(x(:,3)),C)

2 months ago | 0

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