0
$\begingroup$

I try for this ... I try for this

I want to see the result like this

Plots from web

Plot[(-1.047-1.50133 I)*E^((-0.34381+1.35844 I) t) *(1+ Erf[(0.72714+0.9341 
I)* Sqrt(t))+((-1.047+1.50133 I)*E^((-0.34381-1.35844 I) t)*
1+Erf[(0.72714-0.9341 I)*Sqrt(t))]
$\endgroup$

closed as off-topic by Sjoerd C. de Vries, bbgodfrey, Öskå, Bob Hanlon, m_goldberg May 23 '15 at 18:55

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question arises due to a simple mistake such as a trivial syntax error, incorrect capitalization, spelling mistake, or other typographical error and is unlikely to help any future visitors, or else it is easily found in the documentation." – bbgodfrey, Öskå, Bob Hanlon
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 4
    $\begingroup$ Is it supposed that people willing to help will rewrite the formula from an image? $\endgroup$ – m0nhawk May 23 '15 at 12:17
  • $\begingroup$ possible duplicate of Plotting Complex Quantity Functions $\endgroup$ – m0nhawk May 23 '15 at 12:18
  • $\begingroup$ Welcome to Mathematica.SE! I hope you will become a regular contributor. To get started, 1) take the introductory Tour now, 2) when you see good questions and answers, vote them up by clicking the gray triangles, because the credibility of the system is based on the reputation gained by users sharing their knowledge, 3) remember to accept the answer, if any, that solves your problem, by clicking the checkmark sign, and 4) give help too, by answering questions in your areas of expertise. $\endgroup$ – bbgodfrey May 23 '15 at 12:24
  • 1
    $\begingroup$ As noted by @m0nhawk, please enter your code in the question with Mathematica format. $\endgroup$ – bbgodfrey May 23 '15 at 12:25
  • $\begingroup$ @m0nhawk yes,because the image is from the wolframalpha.com ,but I want to use Mathematica to show it. I also try the method of "Plotting Complex Quantity Functions " still can't plot it. $\endgroup$ – Erergo May 23 '15 at 12:40
0
$\begingroup$

In seems that your function has an imaginary part of zero for all inputs in range:

expr[t_] := (-1.047 - 1.50133 I)*
   E^((-0.34381 + 1.35844 I) t)*(1 + Erf[(0.72714 + 0.9341 I) *Sqrt[t]]) + (-1.047 + 
     1.50133 I)*E^(( -0.34381 - 1.35844 I) t)*(1 + Erf[(0.72714 - 0.9341  I)*Sqrt[t]])

Table[Im[expr[t]], {t, 0, 15, 0.1}] // Union
{0.}
$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.