conjugate issue
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12-01-2015, 05:48 PM
(This post was last modified: 12-01-2015 06:12 PM by ji3m.)
Post: #1
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conjugate issue
In my program i build a string like
s := "conj (2+3*i)" and then do r := CAS (s); the returned r is 2-3*i with a funny looking minus sign. But then t := "conj (" + r + ")" gives t := "conj (2-3*i)" But the CAS (t) fails with a major error. At the cas window , when rentering the item with the odd minus sign it is converted by the parser to a normal minus sign so it works. This program shows my problem better. Enter bbb (2+3*i) or even bbb ("2+3*i") . It fails when trying to use return result Q (whick has funky minus sign) EXPORT bbb(S) BEGIN LOCAL P,Q,R,T; DEBUG; P := "conj(" + S + ")"; Q := CAS(P); R := "conj(" + Q + ")"; // using STRING (Q) doesnt help T := CAS(R); // fails here END; I work with android Prime only for now on my Galaxy Tab Pro/Note 2 |
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12-01-2015, 08:03 PM
Post: #2
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RE: conjugate issue
(12-01-2015 05:48 PM)ji3m Wrote: In my program i build a string like This looks like a bug in the "minus" sign that conj() returns. It looks a lot like a negation symbol. Manually copying the result from CAS view changes it to the correct subtraction sign. However, using string conversion seems to keep the invalid character. I wonder if this is an XCAS issue... Graph 3D | QPI | SolveSys |
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12-01-2015, 08:19 PM
Post: #3
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RE: conjugate issue
Finaly a bug that's not just a my own mis-understanding.
My work-around: If type(q) ==DOM_COMPLEX then s:= string (RE (s)) + "+" + string (IM (s)) + "*i "; end; s will be uzed in a cas string.It works nicely. So IM(s) gets a normal minus or evaluates the negation. I work with android Prime only for now on my Galaxy Tab Pro/Note 2 |
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