error when using plot

Not sure why i keep getting error using plot. vectors must be the same length, as the data all have a 2065x1 and im plotting x=[1:10].

aapl = load('aapl.txt');

msft = load('msft.txt');

qcom = load('qcom.txt');

wfc = load('wfc.txt');

aapl_mean = mean(aapl(:));

msft_mean = mean(msft(:));

qcom_mean = mean(qcom(:));

wfc_mean = mean(wfc(:));

similarity_aapl_msft = ((aapl - aapl_mean)'*(msft - msft_mean))/(sqrt(sumsqr(aapl - aapl_mean))*sqrt(sumsqr(msft - msft_mean)));

similarity_aapl_qcom = ((aapl - aapl_mean)'*(qcom - qcom_mean))/(sqrt(sumsqr(aapl - aapl_mean))*sqrt(sumsqr(qcom - qcom_mean)));

similarity_aapl_wfc = ((aapl - aapl_mean)'*(msft - wfc_mean))/(sqrt(sumsqr(aapl - aapl_mean))*sqrt(sumsqr(wfc - wfc_mean)));

if similarity_aapl_wfc > similarity_aapl_qcom && similarity_aapl_wfc > similarity_aapl_msft

display("WFC");

elseif similarity_aapl_msft > similarity_aapl_qcom

display("Microsoft");

else

display("QCom");

end

x = [1 2 3 4 5 6 7 8 9 10];

plot(x, aapl,'r',x,msft, 'b',x,qcom,'g', x,wfc,'m');

[Image Analyst]

You forgot to attach the 4 txt files.

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

Answer 1

[Walter Roberson]

the data all have a 2065x1

That implies that

aapl = load('aapl.txt');

aapl is size 2065 x 1.

x = [1 2 3 4 5 6 7 8 9 10];

x is length 10

plot(x, aapl,'r',x,msft, 'b',x,qcom,'g', x,wfc,'m');

x is length 10 but aapl is length 2065. You cannot plot 10 x values but 2065 y values.

Perhaps you want

mask = 1:length(x);
plot(x, aapl(mask),'r',x,msft(mask), 'b',x,qcom(mask),'g', x,wfc(mask),'m');

[Damien]

thank you so much I've been working on this all day, new to matlab and excited to learn from the community. Thank you so much again!