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Finding a value in a column from a change in another column in a matrix?
ind = X(:,3) == 3.0 & [abs(abs(diff(X(:,3))) - 1e-4) < 1e-10; 0] X(ind,1) or ind = X(1:end-1,3) == 3.0 & X(2:end...

mehr als 10 Jahre vor | 0

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I am trying to create a script which draws a graph of gamma distribution with a fixed value of shape and a varied value of scale factor. I have written this script however, the graph it plots is completely blank. Any help would be greatly appreciated
You just plot a single value.

mehr als 10 Jahre vor | 0

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hello everyone,i have another problem in inserting & extracting data in matlab. can you check please?
C = {{1}, {2}, []; [], {1,2}, {3}};

mehr als 10 Jahre vor | 1

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How to I find a x value from a given y?
x(y==yourvalue) or if you allow for some tolerance tol = 1e-6; x(abs(y-yourvalue) < tol)

mehr als 10 Jahre vor | 7

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Error using - Matrix dimensions must agree. Error in WDO_SG_Code_PL_test1m (line 322) a2=aa-a1; i got the error my code segment is below can any one help me why this error came?
Check the sizes by adding whos aa whos a1 before the a2=aa-a1; line. aa and a1 must have the same size, otherwise ...

mehr als 10 Jahre vor | 0

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hello every one ...i need program for clock..or for e.g need code to write clock
To show the current date and time, use datestr(now) If you want to measure the time, you can use tic; toc or clock and e...

mehr als 10 Jahre vor | 1

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getting the coordinates of green colored portion.
If you have matrix X of zeros and ones, where the ones mark the the pixels of the green object, you can extract its x and y coor...

mehr als 10 Jahre vor | 0

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How to comparison decimal numbers
You can round to 5 decimal places using xr = round(x*1e5)/1e5; You may want to set format long such that the res...

mehr als 10 Jahre vor | 0

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replace elements in columns of a matrix
This is the best I can think of A = rand(1e5, 1); B = rand(1e5, 1); res = nan(size(A)); for i = 1:numel(A) ...

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Convert binary values to a decimal matrix
aback = reshape(bin2dec(num2str(reshape(e, 4, []))), 2, 2);

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generating a randon vector withou repeating any number
x = randperm(18, 17);

mehr als 10 Jahre vor | 1

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Am i correct with my conversion of a Logical indexing to a for loop?
for i = find(T > 10) T(i) = 10; end

mehr als 10 Jahre vor | 0

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i want to keep calculating better values of root iteratively until either the max number of iteration is used or the error is less than the tolerance and then display the values using the switch statement.i think somethin is wrong in my while loop.
k_max = 100; % sample value, maximum number of iterations : while e > tol & k <= k_max :

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Write MATLAB code to create and print a vector GS that stores the first 10 terms of the geometric sequence that halves each time: {1/2, 1/4, 1/8, 1/16, ... 1/1024 }
Initial=input('Enter initial value: ') y(1) = Initial*0.5; for i = 2:10 y(i)= y(i-1)*0.5 end or following St...

mehr als 10 Jahre vor | 0

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Account delete How to?
Contact Mathworks Support.

mehr als 10 Jahre vor | 1

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What is the problem with the following sin approximation?
The formula is wrong. It's (-1)^(n)*x.^(2*n+1)/factorial(2*n+1) for the n'th term. Instead of your solution using X1 and X2, you...

mehr als 10 Jahre vor | 4

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array assignment with and without semicolon
The problem is when a and b change such that the number of elements in a:b change. If you have, say, n elements in a:b for the f...

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Error 'undefined function or variable' occurs even when the variable is defined
You should define your function basis1 in terms of its parameters x1, x2, x3, like function [u1]=basis1(x1, x2, x3) u1 =...

mehr als 10 Jahre vor | 0

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How to run multiple for loops for values of x up to y and then from y up to z.
You don't need loops. Use logical indices instead: b = 10; x = linspace(0,b,1000); ind = x < a; y(ind) = x(ind).^2; %...

mehr als 10 Jahre vor | 0

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Does Matlab uses the same seed generated by the main function for the functions that are called by that function? Results changed!!
Matlab uses a single random number generator for RAND, RANDI, and RANDN, for the command line or in called function. Setting a s...

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Merge two columns into one column?
C = 10.^ceil(log10(B)).*A + B;

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While loop runs infinitely
The code for approximation is wrong. There are some errors in your formula: term takes values 0, 2, 4, ... but should take value...

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how to use if else of for loops to manipulate matrices
To get all values from column 1 of X, where column 2 is > 3.4: x = X(X(:,2) > 3.4, 1);

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Create a Matrix with a specific main diagonal
val = 50; N = 10; X = diag(repmat(val-1, 1, 10)) + ones(N)

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how to put the image that is sky background in the 3D axes in plot
You can show an image in 3D using surf I = imread('cameraman.tif'); [X Y] = meshgrid(1:size(I,1), fliplr(1:size(I,2))); ...

mehr als 10 Jahre vor | 0

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half the first NaN value after the last non NaN value in each column
ind = diff(isnan([p; p(end,:)])) == 1; p(ind) = p(ind)/2;

mehr als 10 Jahre vor | 0

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How can I found the distance SSD (Sum of Squared Differences) between two images ?
X = I1 - I2; ssd = sum(X(:).^2);

mehr als 10 Jahre vor | 4

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I am new to Matlab. Can anyone explain how I get this simple prog to run on my mac?
a=[1 -3 2 5]; try %Try to display an element index = input('Enter subscript of element to display: '); disp(['...

mehr als 10 Jahre vor | 0

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Remove units from a string
s = '1.25ns'; v = sscanf(s, '%f')

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How do I plot a line of a fixed length and slope?
slope = 120/180*pi; length = 10; dx = 10; dy = -20; line([-length/2*cos(slope) length/2*cos(slope)]+dx, [-length/2*sin(slope...

mehr als 10 Jahre vor | 0