How to plot from an array

I'm reading measurement data from my arduino with matlab using Serial communication, that part seems to work but I am now stuck on creating a matrix of those values and making a plot from that matrix. So I tried just adding the values every itteration of the loop but I cannot figure out how to do so.
for ii = 0:Tp:10
fprintf(s,'Z') % Sends measurement command to arduino
A=str2num(fscanf(s)); % Reads measurement from arduino
pause(Tp) % Pause based on previously set time
Time= A(1,1); % Returns only Timestamp (arduino)
Temp= A(1,2); % Returns only Temperature
RH= A(1,3); % Returns only Relative Humidity
end
I thought of adding
plot(Time,Temp) hold on
at the end of every iteration of the loop but that just ends up being a blank figure with the right corresponding numbers on the axes but no data markers

3 commentaires

KALYAN ACHARJYA
KALYAN ACHARJYA le 17 Avr 2019
Modifié(e) : KALYAN ACHARJYA le 17 Avr 2019
% Not sure about your code
% Here I am trying to create vector of Time and Temp with equal length,
% Assuming tp value is 1
for ii = 0:Tp:10
fprintf(s,'Z') % Sends measurement command to arduino
A=str2num(fscanf(s)); % Reads measurement from arduino
pause(Tp) % Pause based on previously set time
Time(ii)=A(1,1); % Returns only Timestamp (arduino)
Temp(ii)=A(1,2); % Returns only Temperature
RH=A(1,3); % Returns only Relative Humidity
end
plot(Time,Temp)
Thnx for the answer, after applying your code I realised what I was doing wrong. I had the start of ii set to zero so I couldn't use
Time(ii)=A(1,1);
since it would give an error. I assumed this was because I wasn't using the ii as a part of the function which I now realize is a wrong assumption. Code is working now, just had to replace
for ii = 0:Tp:10
with
for ii = 1:Tp:10
and it worked.
KALYAN ACHARJYA
KALYAN ACHARJYA le 17 Avr 2019
Modifié(e) : KALYAN ACHARJYA le 17 Avr 2019
Great!

Connectez-vous pour commenter.

Réponses (0)

Catégories

En savoir plus sur MATLAB dans Centre d'aide et File Exchange

Produits

Version

R2019a

Community Treasure Hunt

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

Start Hunting!

Translated by