MATLAB: How to label the maximum and minimum value on a figure

homeworklabel maximum minimum figure

Find the time point that corresponds to the maximum and minimum value. Add a text label to the figure indicating the maximum value. Add a text label to the figure indicating the minimum value.

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Have you used the help? Did you look up max, min, and text? You will use each of those functions to solve your homework exercise. Be sure to accept both output arguments of min() and max(). This should be a really really trivial problem, even for a beginner. It's so simple that we can't really even give hints without solving it. It's just 4 lines of code to call min(), max(), and 2 calls to text().

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MATLAB: Find the maximum value of a function

Hi Ken

Use the following script in order to analyse your function:


clearvars;  clc; close all;
syms x   
% definition of the function
assume(x>-14/30)
y(x)=log(14*x+30)
 
% calculating 2nd derivative
y2(x)=diff(y,2)
% plot second derivative 
fplot(y2, [-13/30 10]); grid on; zoom on;

You will get the formula and the graph of the 2nd derivative of your function:

We get that diff(y,2) is an monotonically ascending function. So its maximum value is always at x=b (and its minimum at x=a)

MATLAB: How to get the sum of the maximum absolute amplitudes located in the positive and negative sides of Y-axis of a signal

Regardless of sign, the amplitude is:

signal = ...;                           % MUAP Vector
amp_max = max(signal) - min(signal);

Definition: MUAP is the ‘motor unit action potential’ in electromyography.

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MATLAB: Find the maximum value of a function

MATLAB: How to get the sum of the maximum absolute amplitudes located in the positive and negative sides of Y-axis of a signal

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