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Student Support Forum: 'Function is not a machine-size real number at...' topicStudent Support Forum > General > Archives > "Function is not a machine-size real number at..."

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Riikka
09/01/03 06:39am

I receive this weird error with functions and equations.

The first one:
\!\(f\ := \ 4 x\^4 + 100 x\ + \ 55\ == \ 20 x\^3 + \ 31\ x\^2\)

...but when I try the graphics:
Plot[f[x], {x, 0, 0.1}];

...I get this text:
Plot::"plnr": "\!\(f[x]\) is not a machine-size real number at \!\(x\) = \
\!\(4.166666666666667`*^-9\)." etc...

The second one is:
funktio4 [x_, y_] :=
x*Sin [y] /; (x >= -\[Pi] && x <= \[Pi] && y >= -\[Pi] && y <= \[Pi]);

But again, "Plot" doesn't work:
Plot[funktio4 [x_, y_], {x, 0, 5}];

Plot::"plnr": "\!\(funktio4[\(\(x_, y_\)\)]\) is not a machine-size real \
number at \!\(x\) = \!\(2.0833333333333333`*^-7\)."

I would appreciate any help!


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Subject (listing for 'Function is not a machine-size real number at...')
Author Date Posted
Function is not a machine-size real number at... Riikka 09/01/03 06:39am
Re: Function is not a machine-size real number ... Henry Lamb 09/03/03 11:17am
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