Programming Problem on code

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

[Fangjun Jiang]

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]

Thanks Jiang for your reply

yes i want to duplicate and repeat the values form 0 to 0.8 ,up till 10.

[Bilal Sadiq]

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]

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)

Answer 1

[Fangjun Jiang]

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

[Bilal Sadiq]

Please see the figure attached ,this is what i want to plot for a time vector of t=0:0.01:10

[Fangjun Jiang]

%% 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);