2.10.21 plot_windrose

Contents

Menu Information

Plot: Specialized : Wind Rose-Raw Data

Brief Information

Create a Windrose plot

Additional Information

Minimum Origin Version Required: 8.1 SR0

Command Line Usage

1. plot_windrose iy:=!3 labels:=0 subcount:=1;

2. plot_windrose -r 1 iy:=[Wind]Wind!(C"Power",B"Speed") labels:=1 ymin:=5 ymax:=10 yinc:=1;

X-Function Execution Options

Please refer to the page for additional option switches when accessing the x-function from script

Variables

Display
Name 		Variable
Name 		I/O
and
Type 		Default
Value 		Description
Input iy

Input

XYRange

<active>
 Specify the input data range.
From Minimum xmin

Input

double

0
 Not editable. It specifies the bin center of the minimum binning level of the wind direction. It is not accessible from dialog.
To Maximum xmax

Input

double

337.5
 Not editable. It specifies the bin center of the maximum binning level of the wind direction. It is not accessible from dialog.
Increment xinc

Iuput

double

30
 Not editable. It specifies the angle increment of the wind direction bins. It is not accessible from dialog.
Number of Direction Sectors xintervals

Input

int

16
 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. This variable specifies the number of sectors for direction data.
Direction Lables labels

Input

int

2
 Specify the direction labels shown on the windrose plot.

Option list:

  • 0=direct_4: N-E-S-W
Show four direction labels: N, E, S, W.
  • 1=direct_8: N-NE-E...
Show eight direction labels: N, NE, E, SE, S, SW, W, NW..
  • 2=direct_16: N-NNE-NE...
Show sixteen direction labels: N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW.
Spoke Style spoke

Input

int

0
 Specify the style of spoke

Option list:

  • 0=sector: Sector
Use sector as spoke style.
  • 1=paddle: Paddle
Use the beginning width of 1st sector as the width of 1st block. Note: When there is no calm circle, all paddles show as lines.
Minimum Speed (Calm) ymin

Input

double

<auto>
 Specify the minimum binning level for wind speed.
Maxmum Speed ymax

Input

double

<auto>
 Specify the maximum binning level for wind speed.
Bins ybinmode

Input

int

<auto>
 Specify the binning method

Option list:

  • 0=inc: Increment

When set to Increment, then you can specify the increment (bin size) for the binning by yinc variable

  • 1=end: Intervals

When set to Intervals, then you can specify the specify bin ends value for the binning by yend variable

Increment yinc

Input

double

<auto>
 Specify the increment (bin size).
Bin Ends yend

Input

string

<unassigned>
 Specify the bin ends value
Number of Intervals yintervals

Input

int

<auto>
 This is not editable. It displays the number of intervals used in the wind speed binning. This is calculated with the current values of Minimum Speed, Maximum Speed and Increment.
Show Calm Circle calm

Input

int

0
 Specify whether to show the calm circle in the plot.
  • 0: false
Not show the calm circle
  • 1: true
Show the calm circle
Orientation orientation

Input

int

0
 Specify the orientation of the wind directions.

Option list:

  • 0=from: Direction (Blowing From)
The directions where the wind blows from.
  • 1=to: Flow Vector (Blowing To)
The directions where the wind blows to.
Quantity to Compute stats

Input

int

0
 Specify what to calculate for each bin.
  • 0=count: Count
Compute and output the count of each bin.
  • 1=freq: Percent Frequency
Compute and output the percent frequency of each bin.
Subtotal Count for Each Speed Interval subcount

Input

int

0
 Specify whether to output subtotal count/percent frequency (determined by stats) for each speed interval.

Option list:

  • 0: false

Not output subtotal count

  • 1: true

Output subtotal count

Output Worksheet rd

Output

ReportData

<new>
 Specify how to output data in the worksheet.

Description

This X-Function is used to create wind rose plot for the raw wind direction and speed data. Firstly, wind direction-speed bins are created from the minumum value to the maximum value of both direction and speed, by a specified bin size. Then each bin is searched and the data points that fall into this bin are counted. If a value falls on the upper edge of the bin, it is included in the next higher bin. Finally, a wind rose is plotted by these 2D bins. Please refer to our User Guide here.

Examples

The following example creates a windrose from our sample data 

doc -s; 
doc -n;
newbook;

//import "Categorical Data.dat" file under "<Origin EXE Folder>\Samples\Graphing" path
string fn$=system.path.program$ + "Samples\Graphing\Wind.dat";
impASC fname:=fn$;

//creating windrose, 
//col("power") as X range and col("power") as Y range
//Number of Direction Sectors = 16, Direction Labels = "N-NE-E..."
//Minimum Speed = 7.5, Maximum Speed = 10.5, Increment = 0.6 
//Subtotal Count for Each Speed Interval is checked 
plot_windrose iy:=(3,2) labels:=direct_8 ymin:=7.5 ymax:=10.5 yinc:=0.6 subcount:=1;
Plot windrose 3.png

Note: in Origin 2017 or ealier versions, this X-Function is not accessible from LabTalk script. To plot windrose from script, you will need to use 

worksheet -px

so in the example about, you will need to use: 

worksheet -px ? WINDROSE plot_windrose iy:=(3,2) labels:=direct_8 ymin:=7.5 ymax:=10.5 yinc:=0.6 subcount:=1;

Related X-Functions

TwoDBinning

Keywords:wind direction, flow