Getting the same incorrect plot with exponential function
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I need to plot this function:
y= e^(2x)-3*e(x)
But matlab keeps showing me the incorrect plot, I mean the same incorrect one even if I change the function.
回答（2 个）
Image Analyst
2021-10-11
That is the correct plot for that equation. What were you expecting? Why do you say it's wrong?
x = linspace(0, 10, 1000);
y = exp(2 * x) - 3 * exp(x);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
xlabel('x', 'FontSize', 18)
ylabel('y', 'FontSize', 18)
And if I change the equation, the plot looks different.
y = @(x) exp(2*x)-3*exp(x)
exp(2*10)
fplot(y, [-2 10])
Looks correct to me. You are asking to plot up to 
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