Questions tagged [missing]
The missing tag has no usage guidance.
40
questions
5
votes
1
answer
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views
How to accomodate empty data set in ListPlot, ListLinePlot?
The simple case often arises where multiple data sets are generated, and one or more is empty. ListPlot and related functions fail to plot such multidata sets. The ...
- 46.6k
5
votes
2
answers
178
views
Fill a sequence containing missing values
Example data
list = {Missing[], Missing[], 100., 200., Missing[], Missing[], 250., 210., Missing[]};
With downloaded data I often have the situation that there are ...
- 48.3k
0
votes
1
answer
58
views
0
votes
1
answer
53
views
ListPointPlot3D syntax for missing data
I have to plot different families of data some of which might be empty. If the data happens to be empty I want to automatically preserve the ordering of the ...
- 4,197
2
votes
2
answers
93
views
Finding Missing Values in TimeSeries
With TimeSeries it is all too common to end up with something like this:
...
- 389
1
vote
1
answer
77
views
Show Gaps in Data for ListLinePlot3D
For some reason, showing gaps in data is easier with ListLinePlot than with the closely related ListLinePlot3D. For example, <...
- 1,597
1
vote
3
answers
180
views
How to Export ragged data to a spreadsheet with missing variables in a way that the Mean calculations in both Mathematica and the Spreadsheet match
This is a multi-dimensional question. It is both about the way Mathematica handles missing values AND the difference in how Mathematica and a spreadsheet separately handle missing values.
I have an ...
- 790
1
vote
0
answers
87
views
Full Information Maximum Likelihood - Under some other name in Mathematica
I have recently stumbled upon something called FIML - Full Information Maximum Likelihood. Apparently this methodology helps overcome missing variables provided the gaps are random. Searching the ...
- 790
2
votes
0
answers
44
views
A natural work with Missing values
For statistical procedures, is there some simple setting to automatically skip the Missing values? (e.g. Options -> "SkipMissing")
The naive
...
- 1,760
1
vote
1
answer
51
views
Specifying the position of the bottom element in a matrix when the last few elements are missing
Suppose I have a matrix (nested list) with some missing elements in the bottom region:
m={{1,5},{2,6},{3},{4}};
m//TableForm
1 5
2 6
3
4
As you see, ...
- 405
2
votes
0
answers
53
views
Need a generalization of NumericalMath`NSequenceLimit to incomplete data
NumericalMath`NSequenceLimit is a great tool to obtain an empirical estimate of the limit of a sequence whose exact behavior is unknown, just from a finite prefix ...
- 7,163
5
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1
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views
Missing["reason"]—can any reason be used?
Can any string be used as a "reason"? Or is there a specific list of acceptable reasons?
For instance,
Missing["refuse"]
works as a missing?
Is there any ...
- 1,760
5
votes
1
answer
116
views
Applying a function on several columns of a dataset fails on Missing
Consider a dataset with missing values:
...
- 1,705
1
vote
1
answer
67
views
Missing Value in ErrorListPlot
I have two lists (of data points and error_y) automatically defined for the usage in ErrorListPlots. Sometimes it happens due to the used data, that a list has only one element and then the standard ...
- 942
2
votes
1
answer
170
views
0
votes
1
answer
260
views
Plotting rescaled time series and temporal data
I am trying to use ListLinePlot to plot three "Components" of my TemporalData in Mathematica. The three components differ widely in the range of the data. So, I want to Rescale each component and plot....
- 131
4
votes
1
answer
80
views
Using TotalVariationFilter on dataset with missing data
TotalVariationFilter does not work on a dataset with missing data.
Does anybody has a good idea to make it work?
I don't know if first splitting the dataset into ...
- 347
1
vote
1
answer
82
views
Using two functions to plot one function
I want to plot the following function, where Uin is the variable (that has to be on the x-axis):
...
- 143
2
votes
1
answer
84
views
Handling Missing values flexibly in Query (MissingBehavior problem)
There’s an inconsistency in how Missing values are imputed in Query, with ...
- 15.1k
2
votes
0
answers
74
views
WolframAlpha robustness
I am experiencing return values of Missing[NotAvailable] from WolframAlpha[], about 10% of the time. For some reason, this seems ...
- 1,141
4
votes
1
answer
103
views
Subtracting Missing[] the old way
In previous versions of Mathematica Missing[]- Missing[] would output
Missing[]- Missing[]. In the current version is outputs 0. Is there a way to get Mathematica to revert back to the old output? ...
- 477
3
votes
2
answers
136
views
Creating dataset from list of ragged associations with defaults for missing keys
Given the ragged dataset in form of association of associations:
...
- 540
1
vote
1
answer
304
views
replace missing values in table with timeseries
I've got my data from a SQL-query like:
Select[date0 /.
SQLDateTime -> DateObject, #[[1]] >
DateObject[{2016, 1, 1, 0, 0, 0.`}] &];
A ...
- 2,615
5
votes
4
answers
695
views
Mean of a list of lists (vector) with missing values
I understand, from Calculating the mean of a list with NaN values, that one can preserve structured data with missing values, and still calculate a mean, using ...
- 835
3
votes
0
answers
47
views
Proliferating NaN value after function execution
Is there any way in Mathematica to define a NaN that proliferates after function execution without throwing errors?
Consider the following example:
...
- 1,535
1
vote
0
answers
91
views
Why is this lattice data missing?
Is there a reason why
LatticeData["FaceCenteredOrthorhombic", "Basis"]
returns
Missing["NotAvailable"]
while
...
- 193
0
votes
1
answer
117
views
In the Wolfram Curated Data Is "Missing[NotApplicable]" Somehow Special?
I have a simple two dimensional table, but I can't seem to Select[], or Cases[] match the data when the second column is ...
7
votes
2
answers
287
views
Query or MapAt ragged associations or ignoring Missing values
Related to this question, can functions be mapped to named Keys in ragged lists of Associations?
...
- 15.1k
3
votes
1
answer
94
views
Evaluating same expression twice gives two distinct answers. Problem with Dataset?
Bug present in 10.4.1 and fixed in 11.0.1
Consider the following Dataset:
d = Dataset[<|1 -> Missing[], 2 -> 2.0|>]
Now evaluate
...
- 959
4
votes
1
answer
150
views
Upvalues for Missing do not work with Dataset
Consider the following Dataset:
d = Dataset[<| 1 -> Missing[], 2 -> 1.0, 3 -> 4.0 |>]
And the following Upvalue for Missing:
...
- 959
4
votes
0
answers
38
views
Missing Completely at Random MCAR
Many other stats packages have tests for MCAR but Mathematica doesn't seem to.
Have a I missed something? If not what would a simple implementation in MMA look like.
(disclaimer I'm new to MCAR ...
- 2,341
3
votes
1
answer
73
views
Trouble with an open QueueingNetworkProcess: Missing Performance measures
I'm trying to create the following open network using Mathematica:
First of all, I define the variables of this network, in this way:
...
- 33
3
votes
0
answers
88
views
Map level inconsistencies with Missing values [closed]
Negative Level specs interact with Missing values, eg:
...
- 15.1k
4
votes
1
answer
149
views
DeleteMissing doesn't match in Association tables
DeleteMissing doesn't work in Association tables:
...
- 15.1k
1
vote
0
answers
155
views
ThermodynamicData missing [closed]
Yesterday I was using ThermodynamicData[] and all was fine, today I try to use it and I get:
Missing[NotAvailable]
Does ...
- 831
1
vote
1
answer
250
views
Problem fitting when some data is missing
I have a problem fitting a function to data, where I only have the falling and rising edges of the data, with the peak having been capped and was wondering if you have some tips.
The data should have ...
- 927
9
votes
1
answer
208
views
Applying functions to irregularly distributed Keys in Association lists
This Q is related to this one, but now refer to the situation as irregularly distributed Keys in lists of Associations:
...
- 15.1k
2
votes
2
answers
211
views
A Query using Select and Quiet fails but Select by itself works
This is closely related to the question here, the key difference is that here data is structured as nested Association rather than a flat list:
...
- 15.1k
0
votes
1
answer
198
views
Dataset fails on StringMatchQ warning due to Missing value
Missing values are a pain mathematically and computationally in general not just in WL, but I think this problem is more related to Dataset handling of warnings:
<...
- 15.1k
14
votes
6
answers
5k
views
How do you skip missing data values in a data file?
In scanning through a simple imported file of weather station data, some dates have missing data.
What is a test to use to check whether a datum is valid? I tried ...
- 435