Programming Problem on code

2020 10 23
1 个回答
更新时间：2020 10 23
4 次查看（30 天）

0 个投票

Hi all ,,
I shall be very grateful to you if you answer my query ,,,My problem is i want to genereate the following graph
t1=[0 0.1 0.3 0.4 0.5 0.7 0.8];
y=[-10 10 15 10 8 -5 0];
Now what i want is : I want to repeat this graph upto t=10 sec (i have time vector t=0:0.01:10 and i want to plot the above y axis values till time t=10)
hope i have put my query right,waiting for some positive response
with kind regards
Bilal

4 个评论
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Fangjun Jiang
Fangjun Jiang 2020-10-23
How do you want the y value to be at t=5 or t=10, linear extrapolation? or just duplicate and repeat the value from 0 to 0.8?
Bilal Sadiq
Bilal Sadiq 2020-10-23
Thanks Jiang for your reply
yes i want to duplicate and repeat the values form 0 to 0.8 ,up till 10.
Bilal Sadiq
Bilal Sadiq 2020-10-23
See what i have tried to to do but in vain
t=0:0.1:10;
% t_x_ankle=[0 0.1 0.2 0.3 0.4 0.5 0.6...
% 0.7 0.8 0.9 1.0 1.1 1.2 1.3...
% 1.4 0.1 0.2 0.3 0.4 0.5 0.6...
% 0 0.1 0.2 0.3 0.4 0.5 0.6...
% 0 0.1 0.2 0.3 0.4 0.5 0.6];
y_ankle=[-10 10 15 10 8 -5 0];
y=zeros(1,length(t));
count=1;
for i=1:length(t)
y(i)=y_ankle(count)
count=count+1;
if count>7
count=1;
end
end
plot(t,Y,'bo')
Please help me
Fangjun Jiang
Fangjun Jiang 2020-10-23
In the simpliest case, would this be what you want?
y=[-10 10 15 10 8 -5 0];
t1=0:0.1:0.6;
t=0:0.1:10.4;
yy=repmat(y,1,15);
plot(t,yy)

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回答（1 个）

Fangjun Jiang
Fangjun Jiang 2020-10-23

0 个投票

t1 doesn't contain t=0.2 and t=0.6. Not sure if it is correct or there is a typo.
You can do repmat(y,1,10) or as many times as you want to match t=0:0.01:10

2 个评论
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Bilal Sadiq
Bilal Sadiq 2020-10-23
Please see the figure attached ,this is what i want to plot for a time vector of t=0:0.01:10
Fangjun Jiang
Fangjun Jiang 2020-10-23
%% Original data
t1=[0 0.1 0.3 0.4 0.5 0.7 0.8];
y=[-10 10 15 10 8 -5 0];
%% interpolate for more data points
t2=0:0.01:0.8;
y2=interp1(t1,y,t2);

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