Super user friendly output for equations

Where I am studying no one knows how to use matlab and lecturers can't read it so I was wondering can matlab do something like this

a=4; b=5; c=6
>> x=a+b/c
x
4+5/6
>> eval(x)
x
....

and could I apply this to function pretty

[Paulo Silva]

wish I could understand what you want

Answer 1

[Walter Roberson]

The "pretty" function is part of the symbolic toolbox. It looks to me as if you would want something like

syms a b c

x = a + b/c * 4 + sym('5/6');
pretty(x)
xval = subs(x, {a,b,c}, {4, 5, 6});
pretty(xval)

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[qazedx]

there is one problem when I pasted your code matlab returned error

??? Undefined function or method 'pretty' for input arguments of type

'double'.

it was when you used pretty(xval)

in general I think this is what I need

[Walter Roberson]

But the parts above executed without trouble? That's odd. The result of subs() should have been a symbolic number. Please tell us what

class(subs(x, {a,b,c}, {4, 5, 6}))

returns, and make sure you do not use double() on the result of the subs() before you do that.

pretty() cannot be used by itself on a double-precision number: it *must* be used on a symbolic expression.

Answer 2

[qazedx]

there is one problem when I pasted your code matlab returned error ??? Undefined function or method 'pretty' for input arguments of type 'double'. it was when you used pretty(xval) in general I think this is what I need

Answer 3

[qazedx]

that is what matlab shows to me: http://i44.photobucket.com/albums/f12/qazedx/Untitled.jpg