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What is the best way to store a large number of data points?
For example temperature values which are measured every minute over lots of locations?
SQL databases with one row per data points doesn't seem very efficient.
Started by Stephan Schmidt on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
We have done work in a power station before, collecting... .
Storing multiple data points to pull out the correct data points you need for a given scenario.
data model and schema to give a better context of the scenario.
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It is obviously possible to hide individual data points in an Excel line chart.
Select a data point. Right click -> Format Data Point... Select Patterns Tab Set Line to None How do you accomplish the same thing in VBA? Intuition tells me there should...
Started by d91-jal on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
This data point will then not display which means you don't need to try and manipulate object of the Point....
In excel a data point represented by a #N in the graph data.
Be controlled from the vba code as well.
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I have two sets of data points that both relate to the same primary axis, but who differ in secondary axis. Is there some way to plot them on top of each other in R using ggplot2?
What I am looking for is basically something that looks like this:
4+ |...
Started by Thomas on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Library(lattice) library(grid) # needed for grid.text # data Lines.raw <- "Date Fo Co 6/27/2007 57.1 in a time-series like that, is to norm the two lines of data so that at a particular value of t, often.
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For large n (see below for how to determine what's large enough), it's safe to treat, by the central limit theorem, the distribution of the sample mean as normal (gaussian) but I'd like a procedure that gives a confidence interval for any n . The way ...
Started by dreeves on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
For a smaller number of data points, your a probability and the degrees of freedom (one less than the number of data points):
g(p,df) = sign(2*p-1 is an....
For your data and a large number of data points.
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I'm kicking around the idea of using the new geometry datatype to represent a vector in the database. The multipoint geometry data type would work well for this, but my question is, is there a way to populate a two column table with the x,y values in ...
Started by Turbo on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Http with 1 - max num of points in any multipoint where nums.number <= mp.vector.STNumPoints().
I'm assuming you have read the Getting Started with the geometry Data Type.
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I have a simple numpy array, for every date there is a data point. Something like this:
>>> import numpy as np >>> from datetime import date >>> from datetime import date >>> x = np.array( [(date(2008,3,5), 4800 ), ...
Started by maplpro on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
For instance, if you have only three data points, you can have absolutely ....
Expect the extrapolation to be always meaningful (especially when you are far from your data pointsThe mathematical models are the way to go in this case.
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I use this code to create and plot N points:
N=input('No. of Nodes:'); data = rand(N,2) % Randomly generated n no. of nodes x = data(:,1); y = data(:,2); plot(x,y,'*');
How do I choose k points (with probability p=0.25 ) out of N points, then color those...
Started by gurwinder on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
data = rand(p*N, 2 values, which will....
); %# generate random points index = (rand(N,1) <= p); %# roll coins to pick with prob p data(~index points in the first place (at least you approach this number as N grows larger)...
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For any graph if we navigate from the range with data displayed to the range wo data to display, the lines disappear, data points from previous data still visible onscreen but will disappear on mouseover.
http://jsfiddle.net/falkenbach/eNSPC/25/
Drag ...
Started by falkenbach on
, 1 posts
by 1 people.
Answer Snippets (Read the full thread at highslide):
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For any graph if we navigate from the range with data displayed to the range wo data to display, the lines disappear, data points from previous data still visible onscreen but will disappear on mouseover.
http://jsfiddle.net/falkenbach/eNSPC/25/
Drag ...
Started by falkenbach on
, 3 posts
by 2 people.
Answer Snippets (Read the full thread at highslide):
It's reported issue, so only what can I advice is to use somekind of workarouns - like don't use scatter series, but spline without line, like this: http://jsfiddle.net/Fusher/eNSPC/145/
However, I think you should consider using two different xAxis -... .
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Can mean (the average) of some data be given in points or rounded off? like can 6.25 be written as 6 or 9.75 as 10
i know these points are not 'silly' like 37 43 31 26 etc, but i still didnt write them:( is that wrong??
Started by jess on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at yahoo):
Most math calculations are rounded to the nearest hundredth.
Of accuracy needed in the data sample.
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