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Combine three columns with comma for a lot CSV files
fileDir = 'D:\Examps'; d=dir(fullfile(fileDir,'*.csv'); for i = 1:numel(d) data=readmatrix(fullfile(fileDir,d(i).name),'Num...

6年弱前 | 0

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[DISCONTINUED] MATLAB Answers Wish-list #5 (and bug reports)
Who's idea to introduce the black background for code? I can read almost nothing now easily with the small contrast between the...

6年弱前 | 0

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Error with Uniquetol: " Repetitive numbers not being removed"
Yeah, fix the magnitude of the tolerance interval you want distinguished--by default uniquetol(A) uses 1e-6 for single-precision...

6年弱前 | 0

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Find indices of elements for given difference
find and/or ismember will only return EXACT matches -- will NOT return something "on or about" a 10 ms interval. Two possibilit...

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How to save multiple matrix in a .dat file
DON'T EVEN THINK OF IT!!! From the documentation... Use one of the text formats to save MATLAB numeric values to text files. I...

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can meaning of ~= be "equal to" ?
Since MATLAB array counting is 1-based, have to move up by one from the 0-based counting. The solution produces the expected re...

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Locating characters in a string array
OK, got the electrical problem in stable state for time being with power back the main well so cattle are drinking...shop not on...

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How to vectorize this for loop
Bundle(:,6)=sum(Bundle(:,1:4).*cost_bundle,2); % cost per account Bundle(:,7)= seguranca*tax*(sum(Bundle(:...

6年弱前 | 1

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How to vectorize this for loop
i = 1:length(Bundle); Bundle(i+n,6) = ( Presuming Bundle is taller (more rows) than wide (columns), the above unless n=0 wil...

6年弱前 | 0

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How to change Y-axis in histfit plot from counts to percents?
hHF=histfit(myVec); Vtot=sum(myVec); arrayfun(@(h) set(h,'YData',h.YData/Vtot),hHF) ... or, w/o the temporary, hHF=histfit(...

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How to adjust the position of a title in a subplot
It's the axis equal that does it -- take out the axis off afterwards and you'll see the position of the title isn't all that fun...

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Median(here it's middle ) of vector/array of every two adjacent values in array (value(i+1)-value(i)).
Not so sure why this would be puzzling... tm=diff(t)/2; You have one few differences than elements of t, of course.

6年弱前 | 0

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How to transform time series into frequency dimain and obtain amplitude and phase
There's really nothing wrong with the code; you have followed the example from the documentation for FFT and the following lines...

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Count words from wordlist in a text
Start @ <Analyze-text-data-with-string-arrays> You may also find ismember of interest for the last...

6年弱前 | 0

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Breaking data from a large text file into groups
Well, the following is pretty easy as far as counting goes...how it works on real file as far as speed and whether need to read ...

6年弱前 | 1

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Error Explanation Error: File: C.m Line: 169 Column: 5 This statement is not inside any function. (It follows the END that terminates the definition of the function "readeph".)
I edited the function for you ...starting with fixing the indention to be consistent by block...which shows when you get back to...

6年弱前 | 1

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How to define the data type of each column in a struct?
MATLAB is amorphous on type -- everything is stored as the type of the RHS on assignment unless directly addressing the element ...

6年弱前 | 0

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Put the name in the "x axis" of the graph bar every five days or seven days
Well, if you say so... :) tEnersol=readtable('enerosolar.xlsx','Sheet','EneDic'); % read into a table object tEnersol.Propert...

6年弱前 | 1

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Put the name in the "x axis" of the graph bar every five days or seven days
Don't put the ticks every day; that's the cause for there being that many--you did it to yourself! :) The bar() command will p...

6年弱前 | 1

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Is there maximum number of characters of the figure title latex interpreter string?
First, you must pass a char() string, not cellstr. You've got too many $ signs for pieces, but a start at what outlined above us...

6年弱前 | 0

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Access data within timerange
The timerange object is another of those opaque thingies TMW has fallen in love with that has useful stuff inside it that is hid...

6年弱前 | 3

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Replacing a column values of a table?
Replace [[time2]=modeldata.Time; time = datetime(time2,'InputFormat','MM/dd/yyyy HH:mm:ss:SSS',... 'Format','dd/MM/yyyy HH:mm...

6年弱前 | 0

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randn() function command help
nddata = fix(8*randn(10,5,3)) "... I am not sure what 8 is doing here, it is not multiplying the outcome of the random number...

6年弱前 | 1

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Error "Index in position 1 exceeds array bounds (must not exceed 1)" for a matrix that has a size of 2000x11
A=(-G(i,j)*(epsilonzz(i-1,j)-epsilonxx(i-1,j)))+tempvalue; You just redefined the whole array A to the RHS consisting of a sing...

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Error bars drawn asymmetrically in errorbar()
Yeah, the y-axis scale is logarithmic so the positive and negative differences are scaled differently depending where on the lo...

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iteration with for for a simple computation
One way amongst many... z=acos(m); % precompute the constant array T=c(1)+sum(cell2mat(arrayfun(@(c,i) c*cos(i*z),c(2:end...

6年弱前 | 0

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How to remove common row elements from matrix
[~,ia]=unique(A(:,10:12),'rows'); O=A(ia,:);

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Linear fit line for multiple Y-axis
You'll get same coefficients if you fit b=polyfit(t,mean(y,2)); % assume columns are variables, rows, observations as will b...

6年弱前 | 1

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How do I use a for loop to index a categorical vector?
If the two indeed correlate, the result should be as expected -- ergo, can only presume they don't correlate as you think...exam...

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draw a line with known slope and one set of coordinates
m=tan(theta); % tan()=y/x --> slope b=y1-m*x1; % intercept to pass thru x1,y1 at given s...

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