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First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

11 years ago

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Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

11 years ago

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Sorting
Assume that x is an n-by-2 matrix. The aim is to return the first column of x, but sorted according to the second column. Exa...

11 years ago

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Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

11 years ago

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I have a matrix which is [y1 x1 y2 x2 y3 x3.......]. The size variable depends on the input, I wanna extract y(i) and x(i) seperately from this matrix.
a=1:10 y=a(1:2:end)' x=a(2:2:end)'

11 years ago | 0

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Maclaurin Series function in matlab
function Maclaurin n=5; x=input('enter the x value: '); epsilon_s=(0.5*10^(2-n)); epsilon=100; maclaurin(1)=1; ...

11 years ago | 0

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Elementwise multiplication, function definition
[x, y] = meshgrid(linspace(0,400,400),linspace(0,30000,400)); A1 = -8.269000000000000; m1 = 2.071000000000000; m2...

11 years ago | 0

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Answered
Failed to add uniform noise to the image
Hi. You don't need imnoise: round(128+0.2)=128 with 0.1 and 0.2 like you didn't add any noise. Uniform noise with zero m...

11 years ago | 0

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could you fix these codes?
Hi. Use cell array: I=imread('moon.tif'); C=mat2cell(I(1:32,1:32),8*ones(1,4),8*ones(1,4)); imshow(C{5},'InitialMagni...

11 years ago | 0

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problem with ssim function
Hi. It's default window: window = fspecial('gaussian', 11, 1.5); If input images has smaller size than 11*11 (it's windo...

11 years ago | 0

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Create an anonymous function after Symbolic differentiation
Hi. syms x f=@(x) x^3+3*x+1; g=diff(f(x)) h=@(y) subs(g,y)

11 years ago | 0

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Troubles with modeling step response in Simulink
Delete your Integrator block, you didn't define it in your code.

11 years ago | 0

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From four different numbers, how can I find out the minimum and maximum numbers that can created from the digits?
Hi. A=7465; A=num2str(A)'; Minimum=str2num(sort(A)') maximum=str2num(sort(A,'descend')')

11 years ago | 1

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Answered
Write a function getatriangle(R,f,b) that takes the number of rows R and returns a character matrix that has the shape of a triangle filled with the character 'f' on a background filled with the character 'b'.
Hi. R = 20; f = '@'; b = '-'; max_num=2*R-1; fprintf('\n'); for i=1:R S1=repmat(b,[1 R-i]); ...

11 years ago | 0

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Subscript indices must either be real positive integers or logicals.
Hi. Use another name for your variable 'sin'. When you use it as a variable,then you can't use it as sinusoid function: fs ...

11 years ago | 0

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built-in 2D convolution vs for-loop convolution differences?
Hi. You need to rotate your kernel 180 degree: x = 0:.1:pi; A = rand(100,100); M = sin(x).^2'*sin(x).^2; figure(1...

11 years ago | 1

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How to output specific matrix component to excel?
Hi. Convert it to two dimensional, then use xlswrite: a=rand(3,3,4000); a1=a(1,1,1:500); a2=a1(:); xlswrite('Matla...

11 years ago | 0

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symbolic differentiation with multiple variables/parameters
See: doc matlabFunction Help: When converting symbolic expressions, the order is alphabetical.When converting symbolic ...

11 years ago | 0

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Sum an array in one dimension to calculate the probability
Hi. A(:,:,1) =[0.4528 0.0477 0.0715;0.0220 0.0023 0.0035;0.0045 0.0005 0.0007;0.0511 0.0054 0.0081]; A(:,:,2) =[0.0129 0...

11 years ago | 0

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How to assign a column vector a name in a matrix while processing multiple files (loop)?
Hi. What is the variable name that you want to calculate its 4th column average? if the name of the variable is the same in all ...

11 years ago | 0

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What is going wrong with my mesh command?
Hi. clear [x,y]=meshgrid(-10:0.1:10) d=max(sqrt(x.^2+y.^2),sqrt((x-5).^2+(y+1).^2)); d=max(d,sqrt((x-4).^2+(y-...

11 years ago | 0

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How to run this MATLAB codes in R-Programming?
Hi. function y=calcul(n,t) for j=1:t for i=1:100 [yy,i1]=fungi(n,j); point(i)=yy(j+1);...

11 years ago | 0

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how can i color the particular block of the image?
Hi. clear grayImage=imread('cameraman.tif'); blockNumber = 34; blockSizeC=32; blockSizeR=32; blockrows =8; b...

11 years ago | 0

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how to find the length of characters stored in cell array?when each column contains words of different length?
Hi. a={'issue', 'information', 'books','subject'} L=cellfun(@length,a)

11 years ago | 0

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Attempted to access x(2); index out of bounds because numel(x)=1. But I'm using a matrix?
Hi. You change your x in first loop : x = x(i) ====> x=22.5 after this x became a number.

11 years ago | 1

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How to draw this figure?
Hi. m=0.5; [x,y]=meshgrid(-11:.1:11); d=sqrt(x.^2+y.^2); S=d; S(d>10)=0; S(d<=10&d>5)=exp(-0.5.*(d(d<=10&d>5...

11 years ago | 0

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Answered
Error using imread (line 368) ; File "..." does not exist
Hi. change your current folder to myFolder: cd(myFolder) or use this: im1 = imread([myFolder pngfiles(1).name])

11 years ago | 0

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Answered
Take mininum over only two dimensions of 4-d array
Hi. R=reshape(1:16,[2 2 2 2]); M=min(min(R,[],4),[],3);

11 years ago | 0

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Call functions with names generated from strings
Hi. fluid.muO=@(p) p.^2+1; fluid.muW=@(p) cos(p)+2*sin(p); phase = 'O'; name = strcat('fluid.mu',phase);%['fluid.m...

11 years ago | 0

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Is it wrong if PSNR is coming IN range of 128 - 170
Hi. It's not wrong, but it's unusual: <http://en.wikipedia.org/wiki/PSNR>

11 years ago | 0