MATLAB: Can movsum be modified a way, so that it will gain the following output:

MATLABmovsum

A=[1,2,3,4,5,6,7,8,9] B=movsum(A,?) B=[1,3,6,10,15,21,28,36,45] My aim is to build a sum along the vector; adding a value to the previous sum. Thanks for helping.

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cumsum()

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MATLAB: Moving sum using movsum()

If you do not specify the endpoints to be discarded, the MATLAB appends zeros at both ends of the array to make them the window fit. For example, if you run

A = [4 8 6 -1 -2 -3 -1 3 4 5];
M = movsum(A,3)

then MATLAB will create matric A like this

A = [0 4 8 6 -1 -2 -3 -1 3 4 5 0];

so that window of size 3 can fit at 4 (first element) and 5 (last element)

MATLAB: Output: Long numbers for no reason

When you perform computations using sym objects, MATLAB will not approximate the result of those computations as a double precision result normally. In order to approximate the results you need to either do something that requires the results to be double precision (like assigning the variable into an element of a double array) or explicitly tell MATLAB to approximate it using the double or vpa functions.

two = sym(2);
sqrt2 = sqrt(two) % displayed symbolically
x = 0;
x(1) = sqrt2
s2 = double(sqrt2)
s2_2 = vpa(sqrt2)

Note that sqrt2 is displayed as 2^(1/2) but x, s2, and s2_2 all display that quantity to a certain number of decimal places. The format function will not affect the display of sqrt2 or s2_2 but will affect the display of x or s2.

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MATLAB: Moving sum using movsum()

MATLAB: Output: Long numbers for no reason

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