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Graphics and Visualization Wolfram Language

Unexpected output from ListLinePlot?

Yoav Wasserman

Yoav Wasserman, Humboldt University

Posted 2 years ago

Hey, I'm trying to plot this: ListLinePlot[{{1/9.30410^-1,2.910(10^-3)}, {1/8.374310^-1,2.9054(10^-3)}, {1/7.443810^-1,2.91901(10^-3)}, {1/6.513310^-1,2.9050(10^-3)}, {1/5.582810^-1,2.91445(10^-3)}, {1/4.652310^-1,2.9178(10^-3)}, {1/3.72110^-1,2.9611(10^-3)}, {1/2.791410^-1,2.9635(10^-3)}, {1/1.860910^-1,3.08623(10^-3)}, {1/9.304710^-2,3.336097(10^-3)}}] But the graph comes out like that I'm sorry for the probably really basic level of knowledge question, but it's the first day I'm using Mathematica, does someone know why the line goes up to the left like that? it should not do it

Hey,
I'm trying to plot this:

ListLinePlot[{{1/9.304*10^-1,2.910*(10^-3)},
{1/8.3743*10^-1,2.9054*(10^-3)},
{1/7.4438*10^-1,2.91901*(10^-3)},
{1/6.5133*10^-1,2.9050*(10^-3)},
{1/5.5828*10^-1,2.91445*(10^-3)},
{1/4.6523*10^-1,2.9178*(10^-3)},
{1/3.721*10^-1,2.9611*(10^-3)},
{1/2.7914*10^-1,2.9635*(10^-3)},
{1/1.8609*10^-1,3.08623*(10^-3)},
{1/9.3047*10^-2,3.336097*(10^-3)}}]

But the graph comes out like that enter image description here

I'm sorry for the probably really basic level of knowledge question, but it's the first day I'm using Mathematica, does someone know why the line goes up to the left like that? it should not do it

POSTED BY: Yoav Wasserman

2 Replies

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Henrik Schachner

Henrik Schachner, Radiation Therapy Center, Weilheim, Germany

Posted 2 years ago

Yoav, your data points are connected in exactly that order given in your data; maybe when sorted according x-values the outcome is more as expected: ListLinePlot[ SortBy[{{1/9.30410^-1, 2.910(10^-3)}, {1/8.374310^-1, 2.9054(10^-3)}, {1/7.443810^-1, 2.91901(10^-3)}, {1/6.513310^-1, 2.9050(10^-3)}, {1/5.582810^-1, 2.91445(10^-3)}, {1/4.652310^-1, 2.9178(10^-3)}, {1/3.72110^-1, 2.9611(10^-3)}, {1/2.791410^-1, 2.9635(10^-3)}, {1/1.860910^-1, 3.08623(10^-3)}, {1/9.304710^-2, 3.336097(10^-3)}}, First]] ... but it's the first day I'm using Mathematica ... In this situation you are ahead of a very steep learning curve, but keep going - Mathematica is worth every effort!

Yoav,

your data points are connected in exactly that order given in your data; maybe when sorted according x-values the outcome is more as expected:

ListLinePlot[
 SortBy[{{1/9.304*10^-1, 2.910*(10^-3)}, {1/8.3743*10^-1, 
    2.9054*(10^-3)}, {1/7.4438*10^-1, 
    2.91901*(10^-3)}, {1/6.5133*10^-1, 
    2.9050*(10^-3)}, {1/5.5828*10^-1, 
    2.91445*(10^-3)}, {1/4.6523*10^-1, 
    2.9178*(10^-3)}, {1/3.721*10^-1, 2.9611*(10^-3)}, {1/2.7914*10^-1,
     2.9635*(10^-3)}, {1/1.8609*10^-1, 
    3.08623*(10^-3)}, {1/9.3047*10^-2, 3.336097*(10^-3)}}, First]]

... but it's the first day I'm using Mathematica ...

In this situation you are ahead of a very steep learning curve, but keep going - Mathematica is worth every effort!

POSTED BY: Henrik Schachner

Eric Rimbey

Posted 2 years ago

Well, that's what your data looks like. If the graph isn't what you expected, then either you didn't actually look at your data or your data is wrong. How did you generate the data?

POSTED BY: Eric Rimbey

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