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Getting statistics from a struct
If measurementA is just one value, you can do: mean([myResults.MeasurementA]) Try it for your data and look at the resul...

9 years 前 | 1

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Draw Legend in MATLAB
For the plot you DO NOT want to show in the legend, do: h = plot(x,y,'-+); %your data set(get(get(h,'Annotation'),'Lege...

9 years 前 | 0

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How to read many arbitrary text files in MATLAB?
k = 1; while exist(['ClCdCm',num2str(k),'.txt'],'file') %insert code to read file k = k + 1; end

9 years 前 | 0

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fprintf not printing correct string
Use: fprintf('%4s %15s \n',str_dat(i,:),num2str(dat(i))) You were not telling matlab to use all the columns of the array...

9 years 前 | 0

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Get new variable based on the average of a column - Matlab
See file

10 years 前 | 2

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Easy textscan question. What is this input?
Yes, 1 is the number of times it repeats the ignore 2 strings, read number instruction. You can use fgetl to read one line at a...

10 years 前 | 0

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PushButton HitCounter / simple question
Add handles.counter = 0; in the GUI opening function. Then in the pushbutton, increment the counter handles.counte...

10 years 前 | 4

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Using ODE45 to solve a state space system.
First, the size of the array of initial conditions has to be the same of the number of equations you want to solve. So, in your ...

10 years 前 | 0

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How to loading a vector with values from a logical index
Vout = Vin(Idx)

10 years 前 | 0

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HOW TO WRITE THE FOLLOWING FUNCTION IN A MATLAB PROGRAM ? ALSO TELL THE WAY TO PLOT F(X)
x = linspace(1e-6,2-1e-6,100); f1 = x(x>0&x<1); f2 = x(x>1&x<2)/2+5; plot(x,[f1,f2])

10 years 前 | 0

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How to take the average of each column of a matrix without including a certain number
Let's call your array "a": my_mean = zeros(size(a,2),1); for i = 1:size(a,2) d = a(:,i);d = d(d~=0); my_me...

10 years 前 | 1

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Problem with fsolve for non linear system
Do this: - in your main function, after calculating P1,P2,P3, put: P0 = [P1(i,1); P2(i,1); P3(i,1)]; options = optimo...

10 years 前 | 1

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Multiple logic outputs not working
You need to wrap everything into a loop DTS = false(3,1); for i = 1:numel(month) ...your code end and use month...

10 years 前 | 0

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Issue with GUI editbox callback
You need to save your variables (i.e. the strings from the editboxes) as fields of the structure handles. So correct your functi...

10 years 前 | 0

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Importdata does not import whole .txt file
I don't know what is wrong with importdata. This version will work. The size of k was based on your file, it may need to be chan...

10 years 前 | 1

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Undefined function t for autonomous ODE
You need to put this part in a separate function and run the new function you create options = odeset('RelTol', 1e-4, '...

10 years 前 | 1

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how to compare special characters in string
If index is empty, $ is not in the string str='$(0)parameter'; index = strfind(str,'$');

10 years 前 | 0

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How to have a function have any number of input arguments
function myfunction(varargin) if(nargin == 1) ..code if there is only one input ...e.g., x = varargin{1}; ...

10 years 前 | 0

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How to find repeated array in a matrix
d = []; for i = 1:numel(b) d = [d;find(a==b(i))]; end

10 years 前 | 0

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How to create a new matrix with some known rows
c = b(a,:)

10 years 前 | 0

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Different outcome by using self time iteration and ode15s.
If you look into your ode, there are a number of variables that you reinitialize any time the function is called, whereas in you...

10 years 前 | 0

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How can I write in excel multiple columns as vectors?
You can create dynamically the range to write to. For instance, starting from A1: xlswrite('myfile.xlsx',Y, ['A1:',char(64+...

10 years 前 | 0

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Removing data points that are out of a specific boundary
[i,~] = find(A(:,1) > 5 & A(:,2) < 4); A(i,:) = []

10 years 前 | 1

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How do you operate on only the non-zero elements of columns within an array?
For sum: netcfq(netcfq<0) = 0; mysum = sum(netcfq,1) for other functions, you could use a loop on the columns and a t...

10 years 前 | 1

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How to apply conditional statements so as to select certain rows or columns on a given dataset.
clc clearvars % Read file filecontent = cell(1000,1); k = 0; fid = fopen('mydata.txt','r'); while 1 ...

10 years 前 | 1

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What should be modified inside the for loop?
Change these lines: f_x_loop = (F*x_a)/(s*Q) f_x_loop_save(i) = f_x_loop(i) into: f_x_loop_save(i) = (F*x_a)/(s*...

10 years 前 | 0

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Adding cell array elements
If all the cells are consistent: mysum = C{1}; for i = 2:numel(C) mysum = mysum + C{i}; end

10 years 前 | 1

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for loop and xlswrite
K is not an integer so you can't use it to select the excel cell. Do this: j = 0; for k=1:0.5:5 j = j + 1; ...

10 years 前 | 1

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I have X vector and Y vector. I have plotted graph. Now I sorted out some peak values (from Y). Stored in pks. Now, corresponding to these peaks values(pks), how I can find its corresponding X values?
If there is a biunivocal correspondence between X and Y (i.e. to each value of X corresponds only one value of Y and vice versa)...

10 years 前 | 0

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Assignment between structures with common fields
If you do not want to assign all the fields of A to B, I'd do: f = {'field1','field2'}; % list of fields for i ...

10 years 前 | 0