- #1

sloan13

- 73

- 0

## Homework Statement

The problem was "Plot the following equation with MatLab, for values of x from -3 to 6.

## Homework Equations

y = x^4 - 4x^3 - 6x^2 + 15

## The Attempt at a Solution

I created a function.

**function r = graph(x)**

for i = 1:x

r(i) = i^4 - 4*i^3 - 6*i^2 + 15;

end

for i = 1:x

r(i) = i^4 - 4*i^3 - 6*i^2 + 15;

end

Then I passed

**fplot(graph(10), [0 10000])**through the command prompt.

It returned

**Error using fcnchk (line 107)**

FUN must be a function, a valid string expression,

or an inline function object.

Error in fplot (line 61)

fun = fcnchk(fun);

FUN must be a function, a valid string expression,

or an inline function object.

Error in fplot (line 61)

fun = fcnchk(fun);

Any ideas on what this means?