How to generate variable sine wave after fixed number of samples

i have to generate a sine wave increasing its frequency about 50khz after certain periods(like it should generate 25 periods of 50 khz and 25 periods of 100khz and go on...) until 1Mhz. Thanks in Advance

Answer 1

[Azzi Abdelmalek]

np=25
f=50
t=0:T/10:T;
y=sin(2*pi*f*t);
for k=1:19
  f=f+50;
  T=1/f;
  t1=t(end)+T/20:T/20:t(end)+np*T;
  y1=sin(2*pi*f*t1);
  t=[t t1];
  y=[y y1];
end
plot(t,y)

[guduguntla sai shankar]

Thank you so much for the answer it worked but i have a doubt what is capital 'T' ? and can we implement this in Simulink with Fixed step solver and a sampling frequency like 10MHz ?

Thanks in Advance

[Azzi Abdelmalek]

T is the period of your sine wave, and yes you can save this signal in a mat file, and use the from file block in simulink

[guduguntla sai shankar]

Hello sir i have doubt,In the above code sine wave is generated succefully but inbetween frequency change there are some unwanted signals.

what is the possibility to make our sine wave increase its frequency exactly after 20 periods?

Thanks in Advance.