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Implementing a function to determine the standard error?

Ion Ganea
Posted 5 years ago
POSTED BY: Ion Ganea
7 Replies
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Jim Baldwin
Jim Baldwin
Posted 5 years ago

You have a few errors in the code.

  • The definition of coeficientOfVariation[val_] is missing an additional f.
  • Sqrt[val["PathLength"]] should be Sqrt[Length[val]].
  • Mean[val["PathLength"]] should be Mean[val].
POSTED BY: Jim Baldwin
Ion Ganea
Ion Ganea
Posted 5 years ago

Thank you for your help. Unfortunately, I need just a bit more. This section's been giving me a few errors. I made a few changes and it seemed to go well but after saving and restarting, they're back.

standardError[val_] := StandardDeviation[val]/Sqrt[Length[val]]
LRad = {7.43, 10.1, 6.07, 9.65};
stdErr = standardError[LRad];

LRad = Apply[Around, Transpose[{LRad, stdErr}], 1];
BarChart[LRad, ChartElementFunction -> "GlassRectangle", 
 ChartStyle -> "Pastel", ImageSize -> 500,
  ChartLabels -> {"1", "2", "3", "4" }, LabelStyle -> {16, Bold},
 AxesLabel -> {"", "cm"}, BarSpacing -> 0.3, 
 LabelingFunction -> Bottom]

The errors: errors
POSTED BY: Ion Ganea
Oliver Seipel
Oliver Seipel
Posted 5 years ago

It is not so obvious what your data are:)

Lets say you have computed your mean data and errors to be:

mean = {7.43, 8.83, 6.06, 13.8};
errors = {4, 3, 2, 1};

then you wrap Around to your data:

data = Apply[Around, Transpose[{mean, errors}], 1];

and BarChart it:

BarChart[data, ChartElementFunction -> "GlassRectangle", 
 ChartStyle -> "Pastel"]

which gives:

enter image description here
POSTED BY: Oliver Seipel
Ion Ganea
Ion Ganea
Posted 5 years ago
POSTED BY: Ion Ganea
Oliver Seipel
Oliver Seipel
Posted 5 years ago
POSTED BY: Oliver Seipel
Ion Ganea
Ion Ganea
Posted 5 years ago

The functions standardError and coefficientOfVariation were evaluated.
POSTED BY: Ion Ganea
Rohit Namjoshi
Rohit Namjoshi
Posted 5 years ago

Out[28] and Out[29] have not evaluated standardError and coefficientOfVariation which means those functions have not been defined. Did you evaluate the cells that contain the definition?
POSTED BY: Rohit Namjoshi
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