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Matrix with the values of the loop
N = ... Value = nan(1,N) % pre-allocation, speeding things up for k=1:N % loop Value(k) = ... % calculation here ...

10 years ago | 0

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help with bar plotting?
Plot them in a single statement. Concatenate the X-values and the Y-values to do that: X = [2.84 3.834]; Y = [0.091713 1...

10 years ago | 0

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how can I multiply a vector by scalar?
C is a cell array. I think you want the content of a cell in C to be multiplied by 2.7. You can do this using cellfun C = {...

10 years ago | 0

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how to insert the column [60;80] into the third column
For what it is worth, take a look at INSERTROWS, which you can use with transpose to get "insertcolumns" after (or before) a spe...

10 years ago | 0

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how we can plot whole the ans
First I suggest you put the output of the function in a variable, so instead of using MyFunction(...) use Res...

10 years ago | 0

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How to convert "do loop" of fortran to matlab?
You have converted them to nested for-loops, in which the inner loop is executed multiple times. I think you want two separate l...

10 years ago | 0

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Develop an m-file function to compute v as a function of t. Develop a script to plot v versus t from t=-5 to 50 .
Create a function m-file like this: function Value = calculateValue (t) Value = zeros(size(t)) % default values ...

10 years ago | 0

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combination function using ndgrid
Take a look the content of ALLCOMB, which does exactly what you're after btw... <http://www.mathworks.com/matlabcentral/filee...

10 years ago | 0

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how to insert the column [60;80] into the third column
A = [1 5 6 ; 0 3 8] A(:,3) = [60 ; 80] % insert a vector in the 3rd column

10 years ago | 0

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How to generate Combination of special sets and subsets
This is called a circulant matrix. I have written a function that can be found in the File Exchange: A = [100 125 300 400] ...

10 years ago | 0

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Answered
How to generate Combination of special sets and subsets
Found both of them :D <</matlabcentral/answers/uploaded_files/52544/found.png>>

10 years ago | 0

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Deleting rows until a certain point
Perhaps this example can help you: % some data t = 1:15 ; v = [0 0 0 0 1 2 4 8 4 2 0 -2 -4 -8 -4] % find the point...

10 years ago | 1

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Average over a cycle
First, do not name your products like this. Use the cell array directly with indexing, or convert to a struct. A solution to ...

10 years ago | 1

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Matrix dimensions to create for loop?
You can use a for-loop: rr = rand(6,200) ; [nr,nc] = size(rr) ; X = eye(nr,1) ; % take it out of the loop V =...

10 years ago | 0

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Extract individual numbers from a list
Do not do this! It is the contents of a variable that should change, not the name of the variable itself. An example in real ...

10 years ago | 0

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Answered
How to attribute numeric values to a function?
Why store the result in a different variable V = input('Enter a number: ') ; switch (V) case 1 out = sin(2) ; ...

10 years ago | 1

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How to multiply elements of a cell array with each other?
You should be aware that matrix multiplication is not commutative (A*B does not equal B*A, in general). A for-loop is the best o...

10 years ago | 1

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From this matrix pattern, how to create a matrix iterations automatically? Thanks guys
V = [-3 1 0 0 0] M = toeplitz(V,V)

10 years ago | 0

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Sampling from distribution summing up to some value
The arguments of GAMRND are the shape parameters of the distribution. Change them and you will change the distribution from whic...

10 years ago | 1

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Answered
'Grid Vectors not strictly monotonic increasing'
This happens when values in X are not unique X = [1 2 3 3 4 5] Y = [10 20 28 32 40 50] interp1(X,Y, 3.5) A workaro...

10 years ago | 1

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How to name/number each line graph in Y axis, instead of the 1-9 numbers?
use the function *text* text(X, Y, STR) will place the string STR at the location (X,Y) on the current axes.

10 years ago | 0

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Answered
Average value of an annulus in a square matrix
R = 3 ; M = magic(2*R+1) ; dr = 1 ; [ri,ci] = ndgrid(1:(2*R+1)) D = hypot(ri-R-1,ci-R-1) for k=dr:dr:R ...

10 years ago | 0

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Can someone help me with my if statements in my function?
I quickly see three issues: # a is always positive so b can never be both positive (>=2*a) and negative (<= 0). # for A = s...

10 years ago | 0

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How can I export a matrix as a CSV file?
You and your computer disagree on what to use as a decimal symbol: a . or a , I strongly recommend you to use a decimal point...

10 years ago | 2

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Ttest for one row of matrix
A simple for-loop would do: Nrows = size(DATA,1) h = zeros(Nrows,1) for k = 1:Nrows h(k) = ttest(DATA(k,:)) e...

10 years ago | 0

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Answered
Computing the difference vector for all possible pairs of columns in a matrix?
Take a look at NCHOOSEK A = [1 2 3 4 ; 10 8 6 4 ; 11 23 35 47] ColIdx = nchoosek(1:size(A,2),2) B = A(:,ColIdx(:,1)) ...

10 years ago | 0

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Answered
genvarname({'A', 'A', 'A', 'A'});
GENVARNAME will become obsolete pretty soon. This is more flexible: C = arrayfun(@(k) sprintf('Sensor%02d',k), 7:13, 'un',0...

10 years ago | 0

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genvarname({'A', 'A', 'A', 'A'});
Why do you want to do this? It is generally a very bad programming idea to generate variable names like this. *"It is the con...

10 years ago | 0

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i have an array, named ersum which have 20000 columns (1*20000). i need to find minimum value of first 50 columns. next minimum value of next 50 columns and so on upto last 50 in that 20000 columns. please send suitable code. thank you sir.
you can RESHAPE your vector into a 50-by-N array and then use MIN which can operate on all columns at once. help reshape ...

10 years ago | 1

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How to do "the black top-hat transformation"
<http://uk.mathworks.com/help/images/ref/imtophat.html>

10 years ago | 0