Timeline for Is this an error/bug with Plot Command?
Current License: CC BY-SA 3.0
10 events
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| Oct 28, 2014 at 16:48 | comment | added | celtschk |
@ChipHurst: Both seem not to be available at Mathematica 8; however I've found them in the web documentation. CubeRoot clearly wouldn't be a replacement for realpower, covering only the very special case $x^{1/3}$. Surd (which IMHO is a contender for the most unintuitively named Mathematica function) gives the more general case $x^{1/n}$; while it would certainly be a better building block for realpower, it's however not a full replacement because it doesn't handle e.g. $x^{2/3}$ (which is the case from the question).
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| Oct 28, 2014 at 15:42 | comment | added | Greg Hurst |
Instead of realpower, you should look into Surd and CubeRoot.
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| Oct 23, 2014 at 17:30 | comment | added | An old man in the sea. | Ok. Many thanks ;) | |
| Oct 23, 2014 at 16:33 | comment | added | celtschk | @Anoldmaninthesea.: Actually, it is not the representation, but the definition of the complex power. It's just easiest described in the polar representation (most probably, internally the formula $x^y=\exp(y\ln x)$ is used, together with an appropriate branch cut for $\ln x$). However see my edit for a function that does what you want (but probably has a lot of room for improvement). | |
| Oct 23, 2014 at 16:32 | history | edited | celtschk | CC BY-SA 3.0 |
added a way to get the real power
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| Oct 23, 2014 at 16:20 | comment | added | An old man in the sea. | Also, thanks for you answer. | |
| Oct 23, 2014 at 16:20 | vote | accept | An old man in the sea. | ||
| Oct 23, 2014 at 16:16 | comment | added | An old man in the sea. | So, by default it represents the number in polar form. Is there a way to make plot use real numbers usual representation only? Because the left side is still missing... | |
| Oct 23, 2014 at 16:06 | history | edited | celtschk | CC BY-SA 3.0 |
fixed broken formulas
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| Oct 23, 2014 at 16:00 | history | answered | celtschk | CC BY-SA 3.0 |