Question

Matlab for engineers 5^th edition

please help me with this problem with explanation.

Consider the following mathematical expression to create a single input-output function.

y= −x^​3+ x^​2 + 2

a)Create a single input-output function that can accept scalar and matrix values.

b)Plot the output versus the input, and properly label the axes and add a title. Note: the plot command should be coded inside the function file.

c)Calculate y values for x= [−10, 10] with an appropriate increment.

Answer 1

function y=expression(x)
y=-x.^3+x.^2+2;%calculates value of y on input xa
plot(x,y)%plots the value of y versus x
xlabel('Input value')
ylabel('Output value')
title('y=-x^3+x^2+2')

%%TYPE IN COMMAND WINDOW

Command Window ー ロ × Editor. CAUsers EDITOR PUBLISH >> %to get function value for x--10 to 10, and plotting them, pass a vector defin >> x--10:"1:10; %vector x created from-10 to 10 with an increment of ,1 Find Fics Y-expression (x) >> y holds the corresponding out put values 97 Run Section New Open Save e compare ▼ SdGoTo▼ EDIT Breakpoints Run Run and Advance Run and Print ▼ Find FILE Figure 1 expression.m+ File Edit View Insert Tools Desktop Window Help Eunction yexpress1on (x) 2y-x.3+x.2+2:calculates value of y on input x 3plot (x,y) aplots the value of y versus x 4 -xlabelInput value') 5-ylabel ('Output value') 6title('y-x*3+x 2+2") 1500 1000 SAVE 25 .. S 500 -500 1000 -10 8 -64 -202 10 Input value

x=-10:.1:10;
y=expression(x);