Write a MATLAB script to return the vector of powers of a number
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Hello, I need to write MATLAB script with the function `powers(x, n)`, which will return a vector with first `n˙ powers of number `x`.
4 Kommentare
Walter Roberson
am 16 Mai 2025
It is not immediately clear that the results are all correct.
powers(2, 5)
powers(-1, 6)
powers(3, -2.5)
powers(0, 0)
try
powers(3, 4:6)
catch ME
warning(ME.message)
end
try
powers(-1:1, 3)
catch ME
warning(ME.message)
end
function result = powers(x, n)
%POWERS Vrne vektor prvih n potenc števila x
% result = powers(x, n) vrne vektor dolžine n, ki vsebuje x^1, x^2, ..., x^n
result = zeros(1, n); % Inicializacija rezultata
for i = 1:n
result(i) = x^i;
end
end
DGM
am 16 Mai 2025
I think the suggestion here is that you need to decide how x and n are to be specified -- i.e. whether they're scalars or arrays.
Given the code, I'm going to assume both x and n are strictly scalar, and you only want strictly positive integer powers.
% inputs
x = 2;
n = 8;
% result in one line
y = x.^(1:n)
Of course, you'd have to roll that into a script, but
Antworten (1)
Sulaymon Eshkabilov
am 18 Mai 2025
Maybe to have a few different options embedded in the function file, e.g.:
clearvars
%% Case # 1.
x = [2.2 3:5]; n = [1.5 3 2];
% %% Case # 2.
% x = 5; n = 3;
% %% Case # 3.
% x = 2; n = [2 4 5];
% %% Case # 4.
% x = 2:5; n = 3;
%% Test the cases:
if numel(x)>1 & numel(n)>1 % Case #1.
Result = POWERs(x,n)
elseif numel(x)==1 & numel(n)==1 % Case #2.
Result=x.^(1:n)
elseif numel(x)==1 & numel(n)>1 % Case #3.
Result = x.^(n)
else % numel(x)>1 & nume(n)==1 % Case #4.
Result = POWERs(x,n)
end
function Result = POWERs(x, n)
if numel(x)>1 & numel(n)>1
for ii=1:length(x)
for jj = 1:length(n)
Result(ii, jj)=x(ii)^(n(jj));
end
end
else
for ii=1:length(x)
Result(ii, :)=x(ii).^(1:n);
end
end
end
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