Group Abstract

Message Boards

WOLFRAM COMMUNITY

11.8K Views

9 Replies

1 Total Like

View groups...

Follow this post

Share this post:

GROUPS:

Mathematics Equation Solving Wolfram Language

Generate a table from Solve or NSolve and plot it?

Hong-Yee Chiu

Posted 7 years ago

I have a simple question. I want to generate a list. To make things simple, I use a simple model. xt = Table[{NSolve[x^2 - .001 i == 0 && x > 0]}, {i, 8}]; This generates a table, but when I inquire the value of xt, I got an answer like xt[[4]] Answer is {{{x -> 0.0632456}}} How can I ListPlot xt? If I want to ListPlot xt versus another table, how can I do it? Much thanks to anyone who can tell me.

POSTED BY: Hong-Yee Chiu

9 Replies

Sort By:

Ruth Davidson

Ruth Davidson, ORAR

Posted 7 years ago

Helpful information shared thank you for helping out others.

POSTED BY: Ruth Davidson

Hong-Yee Chiu

Posted 7 years ago

POSTED BY: Hong-Yee Chiu

Hong-Yee Chiu

Posted 7 years ago

POSTED BY: Hong-Yee Chiu

ivar johannesen

ivar johannesen, oslomet

Posted 7 years ago

Sorry, I ment Table[xt1[[n,2]],{n,8}]

POSTED BY: ivar johannesen

ivar johannesen

ivar johannesen, oslomet

Posted 7 years ago

Table[xt[[n,2]],{n,8}]

POSTED BY: ivar johannesen

Updating Name

Posted 7 years ago

Thank you. I got the following answers. In[16]:= xt = Table[{NSolve[x^2 - .001 i == 0 && x > 0]}, {i, 8}]; In[21]:= { {xt1 = xt /. {{Rule[a_, b_]}} :> b;}, {\[Placeholder]} } Out[21]= {{Null}, {\[Placeholder]}} In[23]:= xt1 Out[23]= {{0.0316228}, {0.0447214}, {0.0547723}, {0.0632456}, \ {0.0707107}, {0.0774597}, {0.083666}, {0.0894427}} Now, how can I get rid of the parenthesis so that the answer will look like {0.0316228, 0.0447214, 0.0547723, 0.0632456, \ 0.0707107, 0.0774597, 0.083666, 0.0894427} so that I can list plot xt1 with another table, like yt1=(1, 2, 3, 4, 5, 6, 7, 8} ? Much thanks for your time.

Thank you. I got the following answers.

In[16]:= xt = Table[{NSolve[x^2 - .001 i == 0 && x > 0]}, {i, 8}];

In[21]:= {
 {xt1 = xt /. {{Rule[a_, b_]}} :> b;},
 {\[Placeholder]}
}

Out[21]= {{Null}, {\[Placeholder]}}

In[23]:= xt1

Out[23]= {{0.0316228}, {0.0447214}, {0.0547723}, {0.0632456}, \
{0.0707107}, {0.0774597}, {0.083666}, {0.0894427}}

Now, how can I get rid of the parenthesis so that the answer will look like

 {0.0316228, 0.0447214, 0.0547723, 0.0632456, \
0.0707107, 0.0774597, 0.083666, 0.0894427}
so that I can list plot xt1 with another table, like
yt1=(1, 2, 3, 4, 5, 6, 7, 8}

Much thanks for your time.

POSTED BY: Updating Name