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Mean of certain elements within a matrix
I think this will work: for i=1:371 Mean_i(i)=mean([matrix(i,5:6),matrix(i+1,2:4)]); end

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How do I plot error bar at only one location ?
just plot first without errorbar and than with errorbar for only the 4th value: plot(u,v,'b') hold on errorbar(u(4),v(4),err(...

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How to use loops to plot add graphs to a plot depending on checkbox selection
Which matlab version do you have? I have 2019a and it works. What do you see if you typ in the command window: fig.Children ...

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How to draw multiple rectangular diffraction pattern
Somthing like this? clc clear all lambda=632e-9; k=(2*pi)/lambda; a=1e-3; b=4e-3; d=20e-3; Io = 100.0; R = 1; Y = (-0.4e-...

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how to randomize a vector as fast as possible
this is finished in 28 sec, i dont know how fast other methods are. tic Vec=1:125000; numelVec=numel(Vec); new_Vec=zeros(1,n...

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How to use loops to plot add graphs to a plot depending on checkbox selection
I think you can use this script as an example: close all fig = figure; checkbox_USD = uicontrol(fig,'Style','Checkbox','Strin...

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How to plot? Having a issue.. Need to plot evolution of the norm of a symbolic matrix for t=0 to 1.
Your PHI is a 4x4 matrix, do you want to plot 16 function against t? That can be done with: syms t PHI=[ 1, t, t/3 - (2*exp(...

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How to use loops to plot add graphs to a plot depending on checkbox selection
You can get the value of the checkbox number i with v=fig.Children(i).Value So maybe you can make a for loop like this: figu...

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How to plot? Having a issue.. Need to plot evolution of the norm of a symbolic matrix for t=0 to 1.
you should use fplot or ezplot (https://nl.mathworks.com/help/symbolic/ezplot.html) to plot a 'sym' variable.

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How to plot Gantt Chart for job shop scheduling?
Do you mean something like this: Number_of_tasks=20; width=200/Number_of_tasks; startDates=1:20; endDates=3:22; for i=1:Num...

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Plotting Terminal velocity Vs particle diameter
With this script you overwrite vt and dp every loop, so at the end you only have 1 single value for vt and dp and you cannot plo...

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Loop is not running in Matlab
There are some errors in your script: i=0.0015:-0.0015:0.00001; Only gives the number 0.0015 as output, if you want that i goe...

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Random shuffle vector such that all elements fall in new index positions
Try this: v=[1:100]; %your vector List=1:numel(v); for i=1:numel(v) newList=List; newList(i)=[]; newpos=datasa...

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Detecting Entire Column has the same integer value
Try this: if a(:,1)==a(1,1)&mod(a(1,1),1)==0 Ans=[1 0]; else Ans=[0 0]; end

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Polyfit is giving incorrect coefficients for correct plot fit.
If I run this script i get a good fit, see image N=10:10:60; t1 = [3.5 6.5 10 12.5 15.5 19]; t2 = [3 6.5 10 13 16 20]; t3 = ...

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nccreate overwrite existing file
Have you tried this: if exist(filename) delete filename end nccreate.....

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How Can i write a function that takes a structure array and returns this array with bubble sorting
Maybe this will work: ages=[structurearray.age]; [a,b]=sort(ages); newstructurearray=structurearray(b); The used structure i...

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year function does not read properly
year(input) tells you in which year the day of the input is, where the input is the day number, starting from first of january 1...

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Extracting a value from a 3D table
Sure, In the first line "Num_nan=find(isnan(Table));" you get the positions of the NaN, but this is just a number. For example,...

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How to solve differential movement equation?
I dont think you can solve this, a relation between x and y, or x and t, or a direction of the force is required.

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Extracting a value from a 3D table
Maybe this works, for output(a,b,c): Num_nan=find(isnan(Table)); c=floor(Num_nan/(81*81))+1; b=floor(rem(Num_nan,81*81)/81)+1...

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How to reuse the same format
Maybe this will work: a='%7.0f'; fprintf(strcat('defaults->',repmat(a,1,9),'\n'),header);

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Guys, i have no idea how to proceed with these two questions, would you please help me out, many thanks guys.
2.3: syms k vpasolve(det(R-k*i3)==13,k)

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Optimize evaluation of triple infinite series using FOR loops
Maybe you can compute p2vec{i,j} outside the k-for loop and multiply it inside the for loop with the k-factor.

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Callback function not forwarding the variables.
If you have the edges of the square you can maybe use this example to get the number of points inside the square. x=1:100; y=1...

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How to limit the movement of a rectangle?
maybe this will work: roi = drawrectangle('Position',p ,'Color',[1 0 0]); t=0; while t<1 pause(0.15);pos=get(roi,'positi...

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How to limit the movement of a rectangle?
Maybe you can use the function: get(roi,'position') But i'm not sure what you want.

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How to setup common file in .XML or .txt format to declare all variables globally for using it in simulink and stateflow?
Creating a txt file can be done with: a=10; b=20; c=30; d=40; FP=fopen(sprintf('textfile.txt'),'wt'); fprintf(FP,'variabl...

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How to save data stored in a cell for easy transfer to excel?
You can use the function writematrix: writematrix(Data,'filename.xlsx')

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Replacing the last value after consecutive Nan
Try this: for i=2:numel(A) if isnan(A(i-1))&&A(i)>0 A(i)=0; end end

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