Saturday, October 22, 2011

Scatter Graphs


!±8± Scatter Graphs

Is a scatter graph to plot the information on two variables. It consists of plotted points, all of which are distributed throughout the lattice XY. The main use of the scatter plot is to display the strength of the co-relation between the two figures. You can also say that scatter plots are used to create the relationship between two variables for a series of paired data. They are mainly used in science to study the relationship between two variables. So it wasfound that the pattern of spread of the relationship and should follow the trend lines describing the data trend. Sign up as many points as possible and let an equal number of unconnected points on both sides.

Scatter is a graph that is how the graphic baseline and require at least two numeric attributes. The model of the dispersion shows a relationship between the two variables used by the X and Y-axes measured or in the case of a 3-dimensional form, isamong the three variables which are measured by X, Y, and Z axes). In a 2 dimensional scatter graphs; one can illustrate trends in the plotted points by just adding a regression curve. It has been noted that the scatter graphs can show multiple data sets, each of which is represented by a different symbol, and each will have any number of data points.

Scatter graph are the one, which clearly establish the data correlation and is one of the best method to illustrate a non-linear pattern. It can be used for data extrapolation and interpolation. A scatter graph generally shows the discrete values which don't occur at regular intervals or which belong to a series. That makes it different from a line graph, which are drawn using only the symbols.

One of the main advantages of a scatter graph is that it demonstrates a typical relationship, which is generally not so clear in various graphing methods normally used. While using standard functions in the Graphics Server DLL, we can define a scatter graph by normally supplying an X position for each data point. It should also be noted that when we use a Graph Control or when we use Graphics Server's autograph DLL, no X positions is supplied and the it will place points at X increments of 1 automatically, starting at 0.

It should be noted that in 3 dimensional (3D) scatter graphs, Z positions are not handled in this way and we needs to supply a Z value for each and every point. We can display scatter plots alone, curves alone, or both while using a 2 dimensional (2D) scatter graphs. While in a 3D scatter graphs, its totally different and we can connect points in the same set with a continuous line. Also we can drop a vertical line from each point.

The limitation of a scatter graph is that, they can just show relationship between two variables at a time. They can also show incorrect graph analysis if there are only few data points available.

Main use of a scatter graph is to visualize the actual measurements or observations on a grid which may reveals patterns and trends (by adding the curves) in those data used on the grid.


Scatter Graphs

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