Questions tagged [missing]

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2
votes
0answers
28 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 ...
5
votes
1answer
68 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 ...
5
votes
1answer
85 views

Applying a function on several columns of a dataset fails on Missing

Consider a dataset with missing values: ...
1
vote
1answer
45 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 ...
2
votes
1answer
111 views

Replacing values in a dataset

Could someone explain why ...
0
votes
1answer
162 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....
4
votes
1answer
57 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 ...
1
vote
1answer
67 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): ...
2
votes
1answer
62 views

Handling Missing values flexibly in Query (MissingBehavior problem)

There’s an inconsistency in how Missing values are imputed in Query, with ...
2
votes
0answers
59 views

WolframAlpha robustness

I am experiencing return values of Missing[NotAvailable] from WolframAlpha[], about 10% of the time. For some reason, this seems ...
4
votes
1answer
90 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? ...
3
votes
2answers
97 views

Creating dataset from list of ragged associations with defaults for missing keys

Given the ragged dataset in form of association of associations: ...
1
vote
1answer
196 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 ...
5
votes
4answers
404 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 ...
3
votes
0answers
33 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
vote
0answers
75 views

Why is this lattice data missing?

Is there a reason why LatticeData["FaceCenteredOrthorhombic", "Basis"] returns Missing["NotAvailable"] while ...
0
votes
1answer
88 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
2answers
248 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? ...
3
votes
1answer
90 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 ...
4
votes
1answer
141 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: ...
4
votes
0answers
35 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 ...
3
votes
1answer
52 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: ...
3
votes
0answers
85 views

Map level inconsistencies with Missing values [closed]

Negative Level specs interact with Missing values, eg: ...
4
votes
1answer
127 views

DeleteMissing doesn't match in Association tables

DeleteMissing doesn't work in Association tables: ...
1
vote
0answers
138 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 ...
1
vote
1answer
208 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 ...
9
votes
1answer
195 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: ...
2
votes
2answers
204 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: ...
0
votes
1answer
162 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: <...
14
votes
6answers
4k 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 ...