How can I fit a line to values and plot it on the same plot as those values?

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Samy Ben Thabet
Samy Ben Thabet 2018-11-29
评论： Samy Ben Thabet 2018-11-30
I have 70 different temperatures that I need to plot over the course of 70 years. I was able to do that but I also have to fit a line to those values and plot it in the same plot. I tried using polyfit but when I tried to plot that it would remove my intitial plot.
Here is a picture of what I need to do Screen Shot 2018-11-29 at 18.01.21.png

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Akira Agata
Akira Agata 2018-11-30
Maybe I guess the usase of polyfit, polyval or hold function in your code is incorrect. How about the following?
% Sample data
Time = 1948:2017;
Temp = (20:0.01:20.69) + rand(1,70);
% Fit with 1st order polynomial
p = polyfit(Time,Temperature,1);
predTemp = polyval(p,Time);
% Plot the result
figure
plot(Time,Temp)
hold on
plot(Time,predTemp)
temperature.png

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