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What happens when a custom made function needs an input for every evaluation in an iteration while optimising the function ?
I created a testing function that mimicked one just used in another Q? -- function T=testit(x) persistent c if isempty(c)...

5年弱前 | 0

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Double y-axis with synchronized to each other
You can scale the percentile axis from [0 0.8] to match the [0 8] range on the other axes; if you scale to percentages, then you...

5年弱前 | 0

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Plot points that meet a specific condition by using a function
num=table2array(D(:,1)); id=table2array(D(:,2)); Err=table2array(D(:,3)); slope=table2array(D(:,4));xnum=find(num==1); xnum=...

5年弱前 | 0

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Using fzero to keep tolerance within limits
As the error message says, you need a function name/handle as the argument to fzero not just an expression. >> fn=@(T)100*(0.15...

5年弱前 | 0

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Error using plot Vectors must be the same length.
On the right track, just have to use the index for both variables... index_liq = (M_CP==2); % index to...

5年弱前 | 0

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Running all Nastran input .bdf files contained in a folder using Matlab
files = dir('*.bdf'); for i = 1 : length(files) filename = files(K).name; system('D:\MSC.Software\MSC_Nastran\20180\bin\n...

5年弱前 | 1

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Detrending a time series with NaN values
With recent (but I'm not sure just how recent) releases, there's the 'omitnan' optional parameter in detrend that will skip the ...

5年弱前 | 0

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Error using chckxy: The first input must contain unique values, while using only unique values
>> load dados >> whos x y Name Size Bytes Class Attributes x 1x58 464 double...

5年弱前 | 0

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How to convert memory to Megabyte
>> m=memory; >> sprintf('%.0f MB',m.MemUsedMATLAB/(1024^2)) ans = '2305 MB' >>

5年弱前 | 0

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How do I set the some letters in an Excel sheet cell to 'BOLD' through ACTXSERVER using MATLAB (R2019a)?
This isn't MATLAB per se, but Excel VBA/object model syntax Q? A sample VBA function would look something like lngPos = InStr(...

5年弱前 | 0

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Generating a normal distrbution random numbers and setting them to catagories
function [abc,ABC]=random_gen(n) r=randn(n,1); % generate column vector N rn ix=disc...

5年弱前 | 0

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Change color of numbers at colorbar
Undocumented property -- underneath is a NumericRuler object which does control the axes ticklabels independently. figure surf...

5年弱前 | 0

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Plot year as major ticks and months as minor ticks
If your time data are evenly-spaced and at monthly intervals, hAx=gca; hX=hAx.XAxis; % get handle to X datetime ruler...

5年弱前 | 0

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URGENT help on TSA with tach signal
I've not used it, but doc (and error message) indicate that the time pulse input is either a fixed scalar or increasing time for...

5年弱前 | 0

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plotting group size vs total member in group of particular size
v =[1 1 1 2 2 3 4 4 5]; % engine u=unique(v); ng=histc(v,u); U=unique(ng) U = 1 2 3 NU=histc(ng,U) ans ...

5年弱前 | 0

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Convert a Complex Number to exponential real
MATLAB has builtin functions abs (or hypot()) and angle() for the above explicit implementations... >> x=complex(2,5); >> cm...

5年弱前 | 3

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Extracting elements from one matrix and placing in another
MATLAB assigns the complete array to the LHS without having used subscrpting to indicate you want to place each plane extracted ...

5年弱前 | 1

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Listing C: folder contents
"The dir command in the Windows command shell behaves in this way, but that's no reason for the MATLAB command to do the same th...

5年弱前 | 0

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How to print strings from a data text file that is in correlation to an indices text file?
Put the indices into a 3D array and just index -- indices(:,:,1)=[1 6 2 3; 3 2 4 0; 1 6 4 7; 0 1 4 7; ... 0 5 ...

5年弱前 | 0

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How to improve efficiency when checking for unique combinations of table values?
tFruit=readtable('fruit.txt'); tFruit=tFruit(:,[1:2:end]); tFruit.Properties.VariableNames={'Fruit','Color','Data'}; tFruit.F...

5年弱前 | 0

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Removing Leading Spaces before xml tags at each line.
The tool seems to format the file to reflect the XML structure; dunno why it would necessarily hurt, but I don't do such things ...

5年弱前 | 1

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How can I solve multiple equations? (Pipeline Design)
function Pc=pipelineExternalPC(d,t,sy) % Usage: % Pc=pipelineExternalPC(d,t,sy) % % returns Pc, pipeline external collapse...

5年弱前 | 1

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Define a matrix in terms of kronecker product
>> I=3;N=4; >> kron(ones(1,N),eye(I)) ans = 1 0 0 1 0 0 1 0 0 1 0 0 0 ...

5年弱前 | 0

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Scientific notation at y-axis with "ax.YAxis.Exponent"
Well, here's a crude first pass... expn=floor(log10(yticks)); mant=yticks./10.^(expn); lbls=cellstr(num2str([mant;expn].','%d...

5年弱前 | 0

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Scientific notation at y-axis with "ax.YAxis.Exponent"
I don't see a user-settable format to force the notation (although I didn't use Yair's getundoc to poke) with arbitrary tick val...

5年弱前 | 0

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FFT, dominant frequency doesnt match time domain?
Your problem is simply that the dominant frequency isn't the same as one of the frequency bin midpoints depending on the number ...

5年弱前 | 2

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Change one line in Excel file
I'd avoid xlswrite and use writecell instead. Use the 'Range' parameter to put in the right place and not disturb anything else...

5年弱前 | 0

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How to find the find the pattern in each row of Matrix?
A=[A;A(3,:)]; % make sure one row has same pattern % the engine B=(A~=0); ...

5年弱前 | 1

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How to make segmented regression line and determine the breakpoints?
I've answered this several time in the past, but never think to keep a link... https://www.mathworks.com/matlabcentral/answers/...

5年弱前 | 0

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Conditional Scatter plotting based on third data set
>> SX=1*all(M==1)+2*(any(M==2)&any(M==3))+3*all(M==3) SX = 2 1 2 1 3 >> Create categorical variable fr...

5年弱前 | 0