wind rose-raw data

3/23/2015 Wind RoseRaw Data

http://www.originlab.com/doc/OriginHelp/WindRoseRawGraph 1/3

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28.10.7 Wind RoseRaw Data

Contents

1 Data Requirements2 Creating the Graph2.1 The dialog of the plot_windrose XFunction

3 Template4 Notes

Data Requirements

Select one Y column (or a range from one Y column). The X column displays the wind direction, and the Y columns contain the wind speed values. If the Y column has anassociated X column, then the X column is used otherwise, the worksheet's default X values are used.

Creating the Graph

1. Select required data.2. From the menu, choose Plot: Specialized: Wind RoseRaw Data..

or

Click the Wind RoseRaw Data button on the 2D Graphs toolbar.

3. Then the dialog of the plot_windrose XFunction opens, allowing you to specify the options for creating the graph.4. Click OK in the dialog to create the graph.

The dialog of the plot_windrose XFunction

(/)



Input

Specify the input data range.

Wind Direction

Specify the data range for wind direction data.

Wind Speed

Specify the data range for wind speed data.

Rows

Choose the rows of the data range from which the windrose graph is plotted.

From

The first row of the range.

To

The last row of the range.

Number ofDirectionSectors

The direction data will be divided into sectors and the counts of data points that fall into each sector will be used to create the windrose plot. Youcan select or enter the number of sectors for direction data here.

DirectionLabels

Specify the direction labels which will be shown on the windrose plot.

NESW

Show four direction labels in the windrose, including N, E, S, W.

NNEE...

Show eight direction labels in the windrose, including N, NE, E, SE, S, SW, W, NW.

NNNENE...

Show sixteen direction labels in the windrose, including N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW.

Wind Speed

Specify the settings for wind speed binning.

Minimum Speed

Specify the minimum binning level for wind speed.

Maximum Speed

Specify the maximum binning level for wind speed.

Increment

Specify the increment (bin size) used in the binning.

Number of Intervals

This is not editable. It displays the number of intervals used in the wind speed binning. This is calculated with the current values ofMinimum Speed, Maximum Speed and Increment.



Orientation

Specify the orientation of the wind directions.

Direction (Blowing From)

The directions are where the wind blows from.

Flow Vector (Blowing To)

The directions are where the wind blows to.

Quantity toCompute

Specify what to calculate for each bin.

Count

Compute and output the count of each bin.

Percent Frequency

Compute and output the percent frequency of each bin.

Subtotal Countfor Each Speed

Interval

Specify whether or not to output subtotal count/percent frequency for each speed interval. When the Quantity to Compute is Count, subtotal countwill be outputted otherwise, percent frequency will be outputted.

Template

WindRose.OTP (installed to the Origin program folder).

Notes

1. When you plot the Wind Rose from raw data, a worksheet named WindRose is added to the source workbook. It stores the binned data from which the Wind Rose isplotted. For more information about the 2D binning algorithm, please refer to The TwoDBinning (/doc/OriginHelp/2DFreqCountBinning).

2. The "calms" (wind speed records that are 0) is counted separately during the binning and the result is listed in the last column in the WindRose sheet.

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