To plot two functions but it shows unrecognized variable.

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VIDHYA HARINI 2023-1-7

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https://ww2.mathworks.cn/matlabcentral/answers/1890132-to-plot-two-functions-but-it-shows-unrecognized-variable

编辑： Torsten 2023-1-7

采纳的回答： Image Analyst

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Hi everyone, I have a doubt, kindly please help me with it.

I need to find graphs for f(x) = e^x-1 and g(x) = 1-x^2 and plot them in the same graph and I also need to find their intersections and area between those two curves.

I am new to this matlab, so I am not really sure how to do this. I hope if there is someone who can help me out with this.

THANK YOU IN ADVANCE.

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Answer 1

Image Analyst 2023-1-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1890132-to-plot-two-functions-but-it-shows-unrecognized-variable#answer_1143627

在 MATLAB Online 中打开

Here's a start?

x = linspace(-1.5, 1.2, 1000);

f = exp(x)-1 ;

g = 1-x.^2 ;

plot(x, f, 'r-', 'LineWidth', 2);

hold on;

grid on;

plot(x, g, 'b-', 'LineWidth', 2);

xline(0, 'LineWidth', 2)

yline(0, 'LineWidth', 2)

To find the intersection, see the links Star referred you to.

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VIDHYA HARINI 2023-1-7

在 MATLAB Online 中打开

And may I know why did you use this? Is that mandatory?

x = linspace(-1.5, 1.2, 1000);

Torsten 2023-1-7

编辑：Torsten 2023-1-7

Do you have a better idea on how to fix the interval and the granularity of the plot ?

To make a plot, you have to fix the interval over which the function is to be plotted and the distance of the points within this interval where the function is evaluated.

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