Howw to scale the nonlinearity in the figure for visual comparison

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Rodney Manalo 2018-5-9

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https://ww2.mathworks.cn/matlabcentral/answers/399826-howw-to-scale-the-nonlinearity-in-the-figure-for-visual-comparison

编辑： Ameer Hamza 2018-5-9

采纳的回答： Ameer Hamza

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Here is the code

if true
Vgo=1.2;
Tr=300;
T=[248:423];
n=3.6;
x=1;
Vbetr=0.7;
Vbe=Vgo-(T/Tr)*(Vgo-Vbetr)-((4-n)-x)*(k*Tr/e)*log(T/Tr)
plot(T, Vbe)
end

clearly the plot of Vbe is nonlinear, but I want to visually show it that it is nonlinear in the plot since the plot shows as:

How do I "exaggerate" the nonlinearity of the plot to compare it with a straight line?

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KSSV 2018-5-9

Undefined variables k and e.....

Rodney Manalo 2018-5-9

those are constants for Boltzmann and Electron charge respectively k=1.38x10-23 and e=1.602x10-19 or in general: k*Tr/e=25.9x10-3

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采纳的回答

Ameer Hamza 2018-5-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/399826-howw-to-scale-the-nonlinearity-in-the-figure-for-visual-comparison#answer_319364

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Since nonlinear term include log(T/Tr), therefore the nonlinearity will signify at smaller values of T. Consider changing the range of T as follow

T=0:200;

will signify the nonlinearity

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Rodney Manalo 2018-5-9

The plot is not to scale. What I'm really asking is how to magnify the nonlinear part of the Vbe to compare it with a straight line

Ameer Hamza 2018-5-9

编辑：Ameer Hamza 2018-5-9

在 MATLAB Online 中打开

The following code will produce something similar

Vgo=1.2;
Tr=300;
T = 0:250;
n=3.6;
x=1;
Vbetr=0.7;
k=1.38e-23;
e=1.602e-19;
Vbe=Vgo-(T/Tr)*(Vgo-Vbetr)-((4-n)-x)*(k*Tr/e)*log(T/Tr);
Vbe_straight=Vgo-(T/Tr)*(Vgo-Vbetr);
plot(T, Vbe, T, Vbe_straight)

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