- edited description
replaceall text from TeXUtilities
4!^(-1)(x-0)^4(D(D(D(D(Cos(x)^2,x),x),x),x)/.x->0)+3!^(-1)(x-0)^3(D(D(D(Cos(x)^ 2,x),x),x)/.x->0)+2!^(-1)(x-0)^2(D(D(Cos(x)^2,x),x)/.x->0)+1!^(-1)(x-0)^1(D(Cos(x)^ 2,x)/.x->0)+(Cos(x)^2/.x->0)
is converted to:
\text{replaceall}({\cos(x)}^{2},x->0)+\frac{{\left( - 0+x\right) }^{1}\,\text{replaceall}(\frac{d}{{dx}}{\cos(x)}^{2},x->0)}{1!}+\frac{{\left( - 0+x\right) }^{2}\,\text{replaceall}(\frac{d}{{dx}}\frac{d}{{dx}}{\cos(x)}^{2},x->0)}{2!}+\frac{{\left( - 0+x\right) }^{3}\,\text{replaceall}(\frac{d}{{dx}}\frac{d}{{dx}}\frac{d}{{dx}}{\cos(x)}^{2},x->0)}{3!}+\frac{{\left( - 0+x\right) }^{4}\,\text{replaceall}(\frac{d}{{dx}}\frac{d}{{dx}}\frac{d}{{dx}}\frac{d}{{dx}}{\cos(x)}^{2},x->0)}{4!}
what is this "replaceall" text?
The input is "Taylor(cos(x)^2, {x,0,4})"
Comments (6)
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reporter -
repo owner Did you evaluate the Taylor expression first?
Try this snippet:
import java.io.StringWriter; import org.matheclipse.core.basic.Config; import org.matheclipse.core.eval.EvalEngine; import org.matheclipse.core.eval.TeXUtilities; import org.matheclipse.core.interfaces.IExpr; import org.matheclipse.parser.client.SyntaxError; import org.matheclipse.parser.client.math.MathException; public class Issue89Example { public static void main(String[] args) { try { // false -> distinguish between upper- and lowercase identifiers: Config.PARSER_USE_LOWERCASE_SYMBOLS = true; EvalEngine engine = new EvalEngine(true); TeXUtilities texUtil = new TeXUtilities(engine, true); StringWriter stw = new StringWriter(); IExpr result = engine.evaluate("Taylor(Cos(x)^2, {x,0,4})"); texUtil.toTeX(result, stw); System.out.println(stw.toString()); } catch (SyntaxError e) { // catch Symja parser errors here System.out.println(e.getMessage()); } catch (MathException me) { // catch Symja math errors here System.out.println(me.getMessage()); } catch (Exception e) { e.printStackTrace(); } } }
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reporter I listen to steps with the steplistener. One of the steps is the one I mentioned in the first post, and when i try to convert it to tex, symja return me the string I posted above. The problem is not the evaluation perse, but the tex conversion...i suppose :/
The example you gave me is ok, it returns the same result to me (1-x^{2}+\frac{x^{4}}{3})
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repo owner You have to change the default TeX output to your preferred TeX output.
For example like in this commit:
https://bitbucket.org/axelclk/symja_android_library/commits/1067c9654f7067fa46453bffe21027965d651b1a
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reporter This solved the "issue". then..sometimes in generated tex strings appear a "/."
eg. Cos(x)^2/.x->0
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repo owner - changed status to resolved
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