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ListPlot a list of numbers in string format?

Hi,

What is the problem in using ListPlot command?

In[6]:= S1 = {"66.4", "2.8", "61.5", "504.4", "155.5", "155.5", "", 
  "", "", "", "", "", "", "", ""}

Out[6]= {"66.4", "2.8", "61.5", "504.4", "155.5", "155.5", "", "", \
"", "", "", "", "", "", ""}

In[7]:= S11 = DeleteCases[S1 /. "" -> x, x]

Out[7]= {"66.4", "2.8", "61.5", "504.4", "155.5", "155.5"}

In[8]:= ListPlot[S11]

enter image description here
POSTED BY: M.A. Ghorbani
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Hans Milton
Hans Milton
Posted 6 years ago

Try this:

ListPlot[ToExpression@S11]
POSTED BY: Hans Milton
Kyle Martin
Kyle Martin, WOLFRAM
Posted 6 years ago

To add to the comment by Hans, the issue is that you're trying to use ListPlot on strings of real numbers, not real numbers themselves.

To get around this, Hans suggests using ToExpression to convert your strings of real numbers into proper numbers that ListPlot can work with. 

In[10]:= ToExpression["12.2"]
Out[10]= 12.2
POSTED BY: Kyle Martin
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