Could any body check my work? (Plot the function)

x = [-56:64];
y = [3.*x^2-5.*x-6];
plot(x,y,'--r','LineWidth',0.5)
xlabel('e')
ylabel('n')
title('kg')

Is this the proper answer for the question? Is there anything I should change for it to become the correct answer?

Answer 1

[madhan ravi]

https://in.mathworks.com/help/matlab/ref/linespec.html?s_tid=doc_ta#f26-701830

Your x and y doesn’t need square brackets. Check your title once again.

[John wick]

So should this be the answer i should give?

x = -56:64;
y = 3.*x^2-5.*x-6;
plot(x,y,'--y','LineWidth',0.5)
xlabel('e')
ylabel('n')
title('kg')

[madhan ravi]

Seems about right, but the title part is confusing , "your weight in kg" , are you calculating any weight?

[John wick]

No I need to create a title for the plot, It's a question I learn, we are not calculating any weight

[madhan ravi]

So why not proceed with the latter code?

Also read https://in.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

[John wick]

What do u mean? which latter code? Could you give me some example?

[madhan ravi]

x = -56:64;
y = 3*x.^2-5*x-6;
plot(x,y,'--y','LineWidth',0.5)
xlabel('e')
ylabel('n')
title('kg')

[John wick]

So I shouldn't use 3.*x Can you explain why it should be that format? why not 3.*x is there any difference?

[madhan ravi]

https://in.mathworks.com/matlabcentral/answers/477409-could-any-body-check-my-work-plot-the-function#comment_738540 - probably reading that link in the comment should help you understand basically you’re still stuck in the fundamentals of MATLAB.

[John wick]

I still need to improve more, I will read and try to understand it from the link you gave me. Thank you so much for helping me all this times!