How do I concatenate properly?

1 view (last 30 days)
Gonzalo on 8 Sep 2022
Commented: Torsten on 8 Sep 2022
for kk = 1:length(amps)
nStart = round(fs .* tStart(kk))+1; %-- add one to avoid zero index
xNew = shortSinus(amps(kk), freqs(kk), phases(kk), fs, durs(kk));
Lnew = length(xNew);
nStop = Lnew + nStart - 1; %======== Add code
xx(nStart:nStop) = xx(nStart:nStop) + xNew;
%xx(nStart + ((kk - 1)):...
% nStop + ((kk - 1))) ...
% = xx(nStart + ((kk - 1):...
% nStop + ((kk - 1)) + xNew;
end
Torsten on 8 Sep 2022
This is horizontal concatenation of xx with xnew.
a = [1 2 3];
b = [4 5 6];
c1 = [a,b]
c1 = 1×6
1 2 3 4 5 6
c2 = horzcat(a,b)
c2 = 1×6
1 2 3 4 5 6

Cris LaPierre on 8 Sep 2022
Edited: Cris LaPierre on 8 Sep 2022
You need to put parentheses around your values to the left and right of the colon operators to force the order of operations to calculate a single value on each side.
xx(nStart + ((kk - 1)):nStop + ((kk - 1)))
should be
xx((nStart + kk - 1):(nStop + kk - 1))
xx=1:10
xx = 1×10
1 2 3 4 5 6 7 8 9 10
nStart = 2;
nStop = 5;
kk = 1;
xNew = 100;
xx((nStart + kk - 1):(nStop + kk - 1)) = xx((nStart + kk - 1):(nStop + kk - 1)) + xNew
xx = 1×10
1 102 103 104 105 6 7 8 9 10

Categories

Find more on Elementary Math in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by