Community Profile # Hikaru

Active since 2014

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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...

alrededor de 6 años 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 ...

alrededor de 6 años 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.

más de 6 años 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 ...

más de 6 años 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...

más de 6 años ago | 1

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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...

más de 6 años ago | 0

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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...

más de 6 años 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

más de 6 años 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...

más de 6 años ago | 11

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...

más de 6 años 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])

más de 6 años ago | 0

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

más de 6 años 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...

casi 7 años ago | 1

Importing and Plotting Data
It's because you have not define the variable |data| .

casi 7 años 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...

alrededor de 7 años 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...

alrededor de 7 años ago | 2

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Help: sort a m by n matrix
Yes, there is a built-in function. c1 = sortrows(c,1)

alrededor de 7 años 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...

alrededor de 7 años 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. ...

alrededor de 7 años 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.

alrededor de 7 años ago | 0

alrededor de 7 años 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...

alrededor de 7 años 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(...

alrededor de 7 años 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...

alrededor de 7 años 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, ...

alrededor de 7 años ago | 1

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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...

alrededor de 7 años 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. ...

alrededor de 7 años 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...

alrededor de 7 años ago | 2