2
کامپیوتر و شبکه::
نقطه داده، نقطه داده
Inaccuracy of a single measurement and data point may be acceptable, and related to the inherent technical error of the measurement instrument.
, data points generated by error but falling within the expected range.
Examining the history of each data point or by re-measurement, however such examination is rarely feasible.،By right-clicking on the data points in the graph (you have to right-click an actual data point, not just the graph itself) and selecting Add Trendline from the menu, you can select a linear regression model to add to the graph.
This error value is squared to make sure it a positive value, regardless of whether the trendline is above or below the data point. 1.09 percent squared is 0.012 percent.
In median regression, the line that's fit to the data will stay close to the typical, inlying data points rather than chase the outliers so much.
It treats the imputed data point as if it's a first-class citizen once it's predicted from the regression line.
Now, in column B enter in the weights for each data point.
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3
عمومی::
مجموعه داده
The idea employed in k-means clustering is to represent each clus- ter Ci by means of a centroid µi ∈ Rm and to measure similarities in terms of Euclidean distances between centroids and data points.
Hence, two data points are considered similar if their distances to a common centroid are small and a point xj will be assigned to cluster Ci if its distance to µi is less than that to any other centroid.
Figure 1: Didactic example of n = 150 data points xj R2 sampled from three bivariate Gaussian distributions.
Thus, minimizing (1) is to determine suitable centroids µi such that, if the data are partitioned into corresponding clusters Ci, distances between data points and their closest cluster centroid become as small as possible.
assignment of data points to clusters does not change anymore or t
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