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Why can't i change an excel file sheets during a loop in matlab
Because in ewb.Worksheets.Item(1).Name =[Varlist(1,a)] ; that's exactly what you told it to do -- rename Item(1) each time. U...

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Create a new excel file from trimmed data
Shure...just build a file name dynamically somehow instead of incrementing the sheet number as you did. FILES={'T04A', 'T04A_1'...

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Combine data from text files into 1?
Exact details for the easiest way to handle the three files would depend on how they're named/saved so as to keep the sets assoc...

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Plot on Boxplot on the same graph
Shift/Rescale the hourly times to be centered about the 1:N values. boxplot(T) hold on W=0.8; % fractional width of eac...

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"Axis" function error
-3 < 0 despite abs(3) being greater -- as the error message says, the axis limits have to be in strictly ascending order numeric...

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How to extract row data by searching in matrix.
x=45; y=105; % lookup values; use variables, don't bury magic numbers in executable code ixy=(Species(:,3)==x)&(Species(...

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I would like to plot few values of a vector based on threshold setting from another vector.
It works; you just can't see the single point that is left because the single point on a default line width without a marker jus...

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How to filter table rows according different conditions?
NHATS_table = readtable(file_name,"VariableNamingRule","preserve"); NHATS_table.Object=categorical(NHATS_table.Object); % c...

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How do I create x-axis in boxplot?
You've got the orientation of the array backwards to use boxplot effectively; it thinks columns are variables and rows observati...

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Error using fgets Invalid file identifier. Use fopen to generate a valid file identifier. Error in fgetl (line 34) [tline,lt] = fgets(fid);
Indeed, just downloaded and unzipped into a clean subdirectory -- it isn't the failure to open ID.dat that you're seeing, it is ...

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extracting nonpivot columns from a matrix
function npc = nonpivotcols(A) [~,p]=rref(A); A(:,pcols)=[]; npc=A; end or function npc = nonpivotcols(A) [~,...

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Check if number of changes from negative to positive on data table and perform set of conditional tests
A=[-5.67 0.999 -5.66 0.994 -5.55 1.024 -5.38 1.049 -5.19 1.065 -4.42 1.175 -3.00 ...

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How to create a log_file.txt that stores my outputs and variables?
Use fid=fopen(fillfile('LogFileBaseLocation','LogFileName.txt','a+'); to open the file for append, read/write access. See fop...

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I cant seem to figure out how to plot my final answer theta-x axis and A,B,C in the y direction. all in 3 separate plots.
E1=40*10^3; E2=8*10^3; v12=0.25; G12=4*10^3; IsotropicComplianceStiffness(E1,E2,v12,G12); function [S,Q]= IsotropicCompli...

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How do I make a probability plot of ranges of values below a certain threshold?
The Q? asked is ... t_delta = max(durations); % strange variable name??? n=histc(durations,1:t_delta); % counts by bi...

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X axis tick labels
The x-axis is not numeric but a @doc:datetime Hmm...I thought they had made that a visible property (bells ringing, @Adam Danz ...

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Error using horzcat Dimensions of arrays being concatenated are not consistent.
In the code section where you combine OBP_i and OBP OBP_i=0; OBP_b = cumsum([OBP_i OBP']); when you only consider a single co...

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readstruct/writestruct changes boolean value true to "true"
Should be able to test this out on local machine... >> s.M1.Normal.enabled=true; % trial struct with logical variable >> s....

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Weighted mean by groups
It's the wmean function definition that's doing it -- what you intended was wmean = @(w,v)mean(w.*v); trying that, id = { 'a'...

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Error about preallocating for speed
a = []; y = 1; for T = 25:5:1000 D = 0.0062*exp(-80000/(8.31*T)); x(y) = 1/T; %error here a(y) = D; %error here...

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How can I add individual datapoints and connecting lines to grouped boxchart?
fn=websave('Data_example.xlsx','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1136410/Data_example.xlsx'); tD=...

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When converting a .txt file to a matrix/cell, MATLAB merges some of the columns together.
C = readcell ('filename.txt'); writematrix ('filename.txt'); C ([1:40], :) =[]; % Delete rows 1-40 from the produced matrix (t...

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Scatter plot with mean for multiple groups
fn=websave('MATLAB_exampledata.xlsx','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1136975/MATLAB_exampledata....

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How to draw negative values on bar when it contains negative values
That's a little more tricky and the examples don't illustrate -- but it's not terribly difficult to fix; the problem is 'Vertica...

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Stacked plot graphics, trying to color multiple lines on one y-axis.
OK, had just a few more minutes -- the real answer is that there's a 'LineProperties' handle under the stacked plot object handl...

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Drawing different coloured bar plots according to different conditions
Well, let's see if I parsed this correctly... data =[ 1 1 2 1 2 35 40 23 36 0 0 1...

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how to avoid getting 0 overlap on the pie chart?
I've never tried a legend with a pie chart; I suppose it also probably works somehow... Well, the patch handle is two objects p...

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How to use dir function with customized number of folders
Go ahead and read all the files into the dir() stuct and then do the culling there... It's easy enough to parse those filename ...

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Duplicate elements in each row
Sure, if am reading the desired output correctly -- NB it appears your c variable is indexed incorrectly; it should be a logical...

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Why my results of regress function and fitlm function are different?
I don't see that...I'm guessing a different y vector, somehow, maybe??? x=[1 2 3 4 5 6 7 8 9 10].'; y=[4 5 2 7 2 8 10 2 1 5].'...

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