How can I plot an equation

Hello, how can I plot the equation: PL/PO = ((1/etha)-1) versus etha? etha = 0.2:0.2:1 Thank you

Answer 1

[Flavio Tonellli]

If i got properly your question here is the code you need:

etha = 0.2:0.2:1;
plot(etha,1./etha - 1);

You have to use the ./ operation instead of the / ones because you are dividing a scalar by a vector. The ./ divide the scalar by each of the vector elements.

This is a really basic question, so i suggest you to read the plot matlab documentation and do the basic tutorial mathworks provide http://it.mathworks.com/support/learn-with-matlab-tutorials.html.

It will be useful to understand better how matlab works! Hope my answer helped you.

Answer 2

[Image Analyst]

Try this:

etha = 0.2 : 0.2 : 1;
PL_over_PO = (1 ./ etha) - 1
plot(etha, PL_over_PO, 'b*-');
title('PL_over_PO vs. etha', 'FontSize', 13, 'Interpreter', 'none');
xlabel('etha', 'FontSize', 13);
ylabel('PL_over_PO', 'FontSize', 13, 'Interpreter', 'none');
grid on;