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Accessing data from a file and putting it into a matrix in Matlab, plus headers.
Is this correct? Basically, yes. When you call the function, |header| should be a cell array of strings, so writeWithHead...

14年以上前 | 0

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saving values without index
Why do you not want to use an index? It is less efficient to just append values to an existing array, but you can: x = [];...

14年以上前 | 0

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create random data
One of the benefits of using MATLAB is that you can use it interactively to try these things out and see if they do what you wan...

14年以上前 | 0

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Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

14年以上前

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Problem with ODE solver
Your equation is defining dy/dx = ay, not dy/dx = ax. Big difference! The solution to the former is y(x) = C*exp(ax); the solu...

14年以上前 | 0

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What do you think of Cody, new service for MATLAB Central
OK, so you know that I'm biased, but let me be clear that I'm stating my personal opinion here, not that of my corporate overlor...

14年以上前 | 2

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Plotting problem
You *are* plotting only the real parts. I think the problem is coming with how you're calculating these functions. You have |b...

14年以上前 | 0

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Could someone please explain...
|r_dat| is a function with no input arguments: function F = r_dat but you're calling it with an input F = r_dat(dat...

14年以上前 | 0

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why can I not create 3 subplots?
|subplot| deletes any axes that are already where you're trying to put the new one. If you're going to set the |position| prope...

14年以上前 | 3

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Need some clarification
Just from looking at the code, it looks as though you're dividing a scalar by a column vector: y = data(:,1); ... ......

14年以上前 | 0

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Please help me convert equation to matlab code.
Assuming that |x| is a column vector N = length(x); k = 0:(N-1); DCTbasis = cos(k'*(2*k+1)*pi/(2*N)); w = sqrt(2/N)*DCTb...

14年以上前 | 0

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varargin
It is used for situations where you want to allow any number of input arguments (so you can't list them). A common reason for t...

14年以上前 | 13

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How do you label the rows and columns of an array?
MATLAB doesn't have a way to tag meta data onto an array. There are, however, several ways to do something like you've asked, b...

14年以上前 | 0

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Interpolate to find values at particular points from a 45x28 matrix
Sounds like a job for |TriScatteredInterp|! F = TriScatteredInterp(X,Y,P); p = F(x,y); Are |X| and |Y| matrices (same...

14年以上前 | 0

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Possible to create a function where the input is changed?
I am not doing this... classdef passbyref < handle properties value end met...

14年以上前 | 1

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Why are the BLAS functions in R2011b much faster than R2008a?
The developers continually work on squeezing a bit more efficiency out of the core math operations, so I'd expect to see an impr...

14年以上前 | 3

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finding roots of the equation
You may want to check your function, because it doesn't seem to have any (real) zeros: f = @(n,I) n*210+(I.^2/n).*((((200-3...

14年以上前 | 1

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How does the MATLAB calculate the arctan?
All inverse trigonometry functions return to a specific limited range, because trig functions are periodic. Hence, if |x = 9*pi...

14年以上前 | 2

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suppressing the display of ans
What Wayne said. But to dig a bit deeper: given that you specifically said "function", I'm guessing you might be confused by th...

14年以上前 | 2

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Difference between Array,Cell array and Subscripted elements of an array..??
Array = a single variable (of any data type) that contains multiple content elements. Cell array = a specific type of array i...

14年以上前 | 12

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Shaded areas in scatter figure
Something like this? patch([-0.25,0,0,-0.25],[1 1 3 3],[0.5 0 0.8],'FaceAlpha',0.4,'EdgeColor','none') patch([0,0.25,0.2...

14年以上前 | 0

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For loop calcs
This is truly weird, and the short answer is that I don't know why it's doing that. The values to loop over should be evaluated...

14年以上前 | 0

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Is my wife right?
Regardless of input, output the string 'yes'.

14年以上前

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

14年以上前

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

14年以上前

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

14年以上前

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Add two numbers
Given a and b, return the sum a+b in c.

14年以上前

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

14年以上前

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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

14年以上前

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

14年以上前