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## Combined plot

**From**: |
Blaz |

**Subject**: |
Combined plot |

**Date**: |
Wed, 27 Jan 2021 01:59:41 -0600 (CST) |

Hello
I have two issues to solve in Octave.
First issue
I have a vector [x]. Is there a simple way to create two new vectors (e.g.
xodd and xeven)? xodd is (obviously) composed from odd index-es of x and
xeven from even ones. I have written the code below, but it fills the blanks
with zeros, which is not ok. I would like to have only the extracted values
in new vectors.
t = [0:0.001:0.03];
x = sin(2*pi*50*t);
for i=1:length(t)
if rem(i,2) == 0
xeven(i)=x(i);
end
if rem(i,2) == 1
xodd(i)=x(i);
end
end
Second issue
When I do have x, xodd and xeven vectors properly calculated I wish to plot
them as following
1. x as a simple plot (x) on first diagram (e.g . subplot (311))
2. x as a simple plot (x) and xeven as arrows between x-axis and plotted x
curve (subplot 312)
3. x as simple plot(x) and xodd as arrows between x-axis and plotted x curve
(subplot 313)
I tried with bar (xodd) and bar(xeven), but I would like to plot the arrows
instead of bars.
Any help is much appreciated
Thanks
--
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