Answered
How to add negative number to the and of rand function
What about x = [floor(10*rand(1,5)),floor(-9*rand)]; (Note: writing "round(rand(1,5)*9)" makes 0 and 9 half as probable...

10 years ago | 0

Answered
Using the floor function to separate numbers
Your mistake occurs at the line: secondary = (initial - initial2)*10; You should have written Secondary = k - ini...

10 years ago | 1

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Answered
Double integral of 2 function products with limits in variables
You can move f(x) outside the inner integral and what remains of the inner integral can be expressed in terms of the cumulative ...

10 years ago | 0

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Answered
Vectorize for-loop that changes overlapping parts of an array
It isn't perhaps that you have a for-loop that is slowing you down so much as that your loop is repeating the writing of ones so...

10 years ago | 0

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Intersection of two triangles
Just combine the 'polyxpoly' result with two applications of 'inpoly' to test if either set of triangle vertices lies within the...

10 years ago | 1

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Answered
Selecting points which belong to parallel planes
It's a matter of simple vector analysis. Let P0 = [x0,y0,z0] be some base point on your principal axis and let n = [nx,ny,nz] b...

10 years ago | 0

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Answered
How to reassign matrix if it is greater than some value quickly
M = a; M(M<b) = 0; M is your answer.

10 years ago | 0

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how to use fsolve function to solve the x, y equations without create another m. file?
I would recommend you reduce your system to one equation and one unknown by substituting "-b/a*x1+.5/a^2" for x2: f(x1) = ...

10 years ago | 1

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Whats wrong with my quadratic formula?
Apparently you are trying to see how many seconds the object in question would take to return to earth. The velocity equation i...

10 years ago | 0

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How can I traverse a circle while identifying given points?
Let P1 = (x1,y1), P2 = (x2,y2), P3 = (x3,y3) be the three points and their respective coordinates. Perform these computations: ...

10 years ago | 0

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Answered
Remove certain elements from a matrix
Or you just write: NewData = OldData(OldData(:,2)==0,:);

10 years ago | 0

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How to add specific rows that meet a condition?
N = 1:26; C =sum(bsxfun(@times,bsxfun(@le,A,N),B));

10 years ago | 0

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compare Vector and matrix
n = size(B,1); B0 = [-Inf(n,1),B]; B1 = [B,Inf(n,1)]; A1 = repmat(A,1,size(B,2)+1); test = double((B0<A1)&(A1...

10 years ago | 0

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How to solve system Ax=0 under the constraint that sum(x)=1?
In order to have a nonzero solution to A*x = 0, the matrix A must be singular, that is, its determinant must be zero. If its ra...

10 years ago | 1

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Answered
Mahalanobis distance dimension question
The reason is that matlab must compute the covariance of the matrix X and then find the inverse of this covariance matrix in ord...

10 years ago | 0

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How to create a random data set from the possible values?
Let L be a column vector with eleven integers, each the count of the number of possible values in the corresponding set of the e...

10 years ago | 0

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How to Findthe permutation matrices that produce another matrix?
Let the matrices A and B be n x n with B a permuted version of the rows and columns of A. s = 1:n; I = eye(n); [~,...

10 years ago | 1

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Answered
I would like to make an equation to solve t when T_max is equal to 450
It is simple division: t = 450/dot(OAe,cross(R,[0;0;1])); (<-- Corrected)

10 years ago | 1

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Subscripted dimension mismatch error dec2hex
The dec2hex(colordata(i,j),6) quantity is a string of at least six hex characters, and yet your are attempting to place it in a ...

10 years ago | 1

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Matrix is singular to working precision.
The matrix xx.^2 is indeed singular by its very nature, since its rows are all alike. When you write yy.^2 / xx.^2 you are aski...

10 years ago | 0

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Answered
Because the plot command does not work? Matlab calculate improper integrals?
The problem here is that (-1)^(1/3) has three different possible roots, namely: 1/2+1/2*sqrt(3)*1i, 1/2-1/2*sqrt(3)*1i, and -1. ...

10 years ago | 0

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How to find parameters of the following coefficient based on optimization tool?
Define the following sum of squares of differences: ew=[0.679 0.613 0.613 0.501 0.497 0.50 0.389 0.386 0.386 0.391 0.390 ...

10 years ago | 0

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Could someone please help me create a three-column array?
Here is my guess as to what you mean: M = [mean(measles,1).', mean(mumps,1).', mean(chickenPox,1).']; Each value in M is th...

10 years ago | 0

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Answered
Bit missing after circular shift
Your result can be accounted for if your A row vector is a string vector of 1's amd 0's except that its first element is a blank...

10 years ago | 0

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Answered
cannot find explicit solution symbolic equation
You have what appears to be two equations but only one unknown, namely 'lamb1'. You might try listing 'lamb3' as a second unkno...

10 years ago | 0

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How to iterate through 4Th array dimension a summation over the first 3 dimensions
A = sum(reshape(S,3*3*4,181),1); This will give you a vector with 181 elements, each being the sum over all the first thre...

10 years ago | 0

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how to store the each values of x and y in the following loop so that i could plot graph x vs y ?
Change the two lines x=bc(1); y=bc(2); to: x(object)=bc(1); y(object)=bc(2); If 'stats' is large it ...

10 years ago | 1

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Answered
how can i specify a parameter for each element of a random matrix?
Let Imin and Imax be n x m matrices in which Imin(i,j) is to be the lower limit for a(i,j) and Imax(i,j) its upper limit. ...

10 years ago | 1

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Adding multiple elements from an array
A(1:9:55) = 0; v = sum(A,1);

10 years ago | 0

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How to get a 3-D matrix out of my code.
doppler = repmat(reshape(frequency.',80,1,780),1,5512,1) .* ... repmat(reshape(c./(c+v_doppler.'),80,5512,1),1,1...

10 years ago | 0

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