Analysis

Andres Andresson Updated by Andres Andresson

Analysis allows you to do a analysis on 2 or more variables such as Cross Correlation, Regression and detailed Statistics.

Select Variables & Time

Click on the + icon to select Variables and use the date picker to choose the correct timer period.

Cross Correlation

Clicking this option will display a cross correlation table for the variables selected (maximum of 5 variables).

  • Each table cell represents the correlation between a pair of variables.
  • Clicking on any of the cells will open up the regression component for the selected variable pair.

Best fit

Calculates the correlation between all variables within the time shift period option selected and displays the best fit value for each variable pair. It will shift variables on the X-axis ± the value selected.

If ± 20 is selected then VDV will find best match when shifting the variables on X-Axis ± 20 readings.

This is a great option when there is a delay in Correlation between variables.

Regression

The regression option will display a scatter plot for two variables, then calculate and display a regression line.

You can easily switch between variables by navigating the X & Y Variable drop down lists on the right hand side.

Time Shift

Same as Best Fit but you can manually shift the data.

Shifts the data for the X variable by number of readings selected. Meaning if -5 is selected for Time Shift the the X variable is shifted backwards for 5 readings.

Best Fit

Calculates the correlation between all variables within the time shift period option selected and displays the best fit value for each variable pair. It will shift variables on the X-axis ± the value selected.

Statistics

The statistics option will display detailed statistics for each variable for the selected time period.

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