Weekly ProgressWeekly ProgressMAGGIEMAGGIE

88thth March 2006 March 2006

OverviewOverview I am currently working on a software in java I am currently working on a software in java

which provides graphical analysis of PingER which provides graphical analysis of PingER historical data.historical data.

Currently it is graphing RTT, Packet Loss, Currently it is graphing RTT, Packet Loss, Throughput from various monitoring sites (CERN, Throughput from various monitoring sites (CERN, Stanford etc) to the world.Stanford etc) to the world.

The various analyses it provides include:The various analyses it provides include:– Bar Charts of average values.Bar Charts of average values.– Line Charts of values overtime.Line Charts of values overtime.– Trendlines or Exponential Regression Analysis Trendlines or Exponential Regression Analysis

plots.plots.

OverviewOverview

Current TasksCurrent Tasks Currently the analysis most important for Currently the analysis most important for

SLAC is the exponential regression of SLAC is the exponential regression of historical data.historical data.

This means that we need to fit the This means that we need to fit the historical data for a country/region to an historical data for a country/region to an equation of the formequation of the form

Y = a * e Y = a * e xx

Current tasksCurrent tasks

Current TasksCurrent Tasks I am currently working on some I am currently working on some

improvements suggested by SLAC improvements suggested by SLAC including:including:– Logarithmic Y-axis Logarithmic Y-axis – Residuals of the exponential regression Residuals of the exponential regression

fitting with each series.fitting with each series.– Options of showing the actual data Options of showing the actual data

points with each trendline.points with each trendline.– Patterns instead of colors for the Patterns instead of colors for the

trendlinestrendlines

Logarithmic AxisLogarithmic Axis This has been completedThis has been completed

Fitness of Curve (residuals)Fitness of Curve (residuals) I have modified my regression class to I have modified my regression class to

calculate the residuals.calculate the residuals.

Currently working to enable the plotter Currently working to enable the plotter class to pick up these items from class to pick up these items from regression class to display as tooltips with regression class to display as tooltips with the trendlines.the trendlines.

Data Points with trendlinesData Points with trendlines I have added a second y-axis which will be I have added a second y-axis which will be

used to simultaneously show the actual used to simultaneously show the actual data points.data points.

Also directed a query to SLAC to ask Also directed a query to SLAC to ask whether they need to show the data on a whether they need to show the data on a linear or logarithmic axis.linear or logarithmic axis.

Patterns instead of colorsPatterns instead of colors I have found a function which gives me I have found a function which gives me

access to a Stroke object for drawing the access to a Stroke object for drawing the lines. lines.

I am using it to vary the patterns used to I am using it to vary the patterns used to create the lines.create the lines.

This is important to use the software for This is important to use the software for creation of charts used in reports and creation of charts used in reports and papers.papers.

THANKYOUTHANKYOU