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**Content Feed**

How to find a special numbers among time series data

There might be a more efficient way to do this. But, the code below should work. timesecond = xlsread('time.xlsx'); % reads...

7 years ago | 0

errors when running file

The function hh doesn't have input. I think MATLAB expect it to have at least one input. You need to change the first line into ...

7 years ago | 0

Simple For Loop To Find Indices

Are your variables stored as double, or cells? edit: I'm sorry. I made a mistake and I removed the incorrect statement.

7 years ago | 0

Simple string to number help; how to convert this into a number?

Assuming that H1 contains only one value, you could use n = H1{1} % to access that value in the cell if c <=0 ...

7 years ago | 0

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I need to replace an enitre row, if any of the value goes less than zero

This will solve it. a1=[1 2; 3 4; -5 6] a2=[22 23; 56 78; 89 75] neg = a1<0 % return '1' for values le...

7 years ago | 1

| accepted

how to identify rows and columns of a random array with a undetermind amont of rows or colloms

I'm just stating my opinion here. But, do you really need to name the rows and columns as specific variables? Isn't it more effi...

7 years ago | 0

| accepted

listing only the first index

The function |max| alone is sufficient, you don't have to use |find| for this sort of problem. [Y,I] = max(A) The variab...

7 years ago | 0

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How to add number of cells in a column and not the values in that cells?

V = xlsread('Book1.xlsx'); c = V <= 0; % check the condition ans = sum (c) % count total number of cells

7 years ago | 0

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extract first row from matrix

You have the wrong syntax. Lets say A is your 2x5 matrix. A = rand(2,5) Then to extract the first row, you simply use...

7 years ago | 15

how to read specifiied values from xls file?

This happens when you use |fprintf| to save a file in .xls extension. To solve this, use |xlswrite| to write the data into Ex...

7 years ago | 0

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How do I solve for two unknowns in this matrix?

This should solve your problem: [A, B] = equationsToMatrix([C, D], [F, G])

7 years ago | 0

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read text file into matlab

Use textscan. FID = fopen('iris.txt') C_data0 = textscan(FID,'%f %f %f %f %s', 200, 'Delimiter',',') numericVector = ...

7 years ago | 0

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can xlsread read everything as strings ? if not, are there any other options ?

Have you tried using the command: [~,~,RAW]=xlsread('filename') The variable |raw| will contain everything, if I'm not m...

8 years ago | 1

Importing and Plotting Data

It's because you have not define the variable |data| .

8 years ago | 0

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How to remove duplicate NaN values from an X Y data set

There might be more efficient ways to do this, but the following code works. data=[1,2;3,4;nan,nan;5,6;nan,nan;nan,nan;10,1...

8 years ago | 1

How can I remove zero values from the followning label matrix?.

If your matrix is A, then A(A==0) = [] will remove the zeros. But it will change the matrix into a vector. If you wan...

8 years ago | 2

| accepted

Help: sort a m by n matrix

Yes, there is a built-in function. c1 = sortrows(c,1)

8 years ago | 0

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Simple matlab code issue

B is a 3x3 matrix and C.^2 is a 3x1 matrix. There's no way you can add them. If you want to square matrix C (i.e. C^2), then C h...

8 years ago | 0

How to reduce number of entries in legend

I don't really understand the specifics here, but you could choose which plot to display in the legend if you have the handles. ...

8 years ago | 0

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How do I change workspace variable?

var_name = ans; Or in your code, you could've assign a name to it. That way you don't have to manually do it each time.

8 years ago | 0

division of uploaded excel file

[Yield,txt,alldata]=xlsread('Book2','Yield'); a=length(txt(1,:)) for i=1:a assignin('base',[txt{i}],Yield(:...

8 years ago | 0

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matlab program for getting results of all inputs sets in one column

You have to define n as an input to the function |poster|. I added outer for loop, there might be better ways, but if n is small...

8 years ago | 1

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How can I save a series of random numbers i have generated?

r = 100; %number of rows c = 1; %number of columns A = randi(100,r,c); %generate integers between 1 and 100 csvwrite(...

8 years ago | 0

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grabbing number after decimal

One way to do this specialNumber = [1234.5; 9087.3]; d = abs(specialNumber - fix(specialNumber)); answer = d*10; %ass...

8 years ago | 0

How to make Xaxis (y=0) black in grid

Not sure if this is exactly what you want to do, but instead of making it darker, why not making it thicker? x = [1, 2, 3, ...

8 years ago | 1

| accepted

Not Enough Input Arguments in GA

You have to define the variable x before you run this program. The error "Not Enough Input Arguments" means that MATLAB doesn...

8 years ago | 0

placing values in the form of a triangle in a matrix

If you want it to be a matrix, then I don't think there is a way to do it without adding 0's in the lower part of the triangle. ...

8 years ago | 0

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End-of-array value entry

Instead of substituting with i=1:id(end) Use: i=1:length(id) You also might want to preallocate Vd since it chan...

8 years ago | 2

how to transfer complex results into excel??

Try this. Say A is a vector containing the complex numbers. A = [2+3i;3+i;4-2i]; % example B = num2str(A); C = cel...

8 years ago | 0

running a project using genetic algorithm

Try changing the first line in all your files. GAmodule.m should start with: function GAmodule And penalty2.m should...

8 years ago | 0

| accepted