Charting a Frequency Distribution

  • Thread starter Thread starter Guest
  • Start date Start date
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Guest

Greetings, math and Excel wizards! Looking for an idea on how to convert random data into bins of magnitude vs frequency of occurrence, then chart the data. Specifically
1. Data: Electrical demand values for a manufacturing facility, in 15-minute intervals, for an entire month. Data is basically a time-marked stream of kilowatts vs date/time
2. Goal: Create a data set and corresponding chart of kilowatts vs frequency of occurrence. The abscissa will be frequency of occurrence, from 1 (where the single, maximum peak value occurs) to several hundred. The ordinate will be the kilowatt value, or perhaps a bin containing kilowatt values between two values. I envision there will be a single, maximum peak value at the y-axis, then a decreasing function. Mathematically, this is somewhat like a Fourier transform used in vibration analysis, where you take a signal of amplitudes in the time domain and transform it into the frequency domain to identify vibration at significant frequecies

Any suggestions would be greatly appreciated. Thanks.
 
Mark -

Look at the frequency worksheet function, or at the Histogram tool in
the Analysis Toolpack (Tools menu > Data Analysis).

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
_______
 
Mark -

You can set up your bins as for the Histogram tool, but use the
Frequency worksheet function to compute your own values. Chart the
calculated values in a column chart. When the monthly values change, the
calculations change, and the chart updates accordingly.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
_______
 
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