Each spoke is divided by color into wind speed ranges. This chart shows the frequency and speed of wind blowing from each direction.Īs you move outward on the radial scale, the frequency associated with wind coming from that direction increases.
Wind can vary a lot by site and the provided weather data may not be accurate for you)
(But make sure this data is valid for your site. In Insight you can produce tri-monthly Wind Rose charts to observe how wind patterns change throughout the year. Wind roses can be a yearly average, or can be made for specific seasons some even include air temperature information. 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.Wind rose diagrams help you visualize wind patterns at a site. Use them to better inform your design decisions, but be aware of unique microclimates and site considerations that wind rose diagrams will not capture.Ī "wind rose" diagram is the most common way of displaying wind data, and can be measured in a “speed distribution” or a “frequency distribution".For more information about the 2D binning algorithm, please refer to The TwoDBinning. It stores the binned data from which the Wind Rose is plotted. When you plot the Wind Rose from raw data, a worksheet named WindRose is added to the source workbook.WindRose.OTP (installed to the Origin program folder). When the Quantity to Compute is Count, subtotal count will be outputted otherwise, percent frequency will be outputted. Specify whether or not to output subtotal count/percent frequency for each speed interval. Percent Frequency Compute and output the percent frequency of each bin.Count Compute and output the count of each bin.Flow Vector (Blowing To) The directions are where the wind blows to.Direction (Blowing From) The directions are where the wind blows from.Specify the orientation of the wind directions. You can define this value at Radial Axis dialog after the plot is created. By default, the calm circle is center at 15% of radial scale. Specify whether to show the calm circle in the plot. This is calculated with the current values of Minimum Speed, Maximum Speed and Increment. It displays the number of intervals used in the wind speed binning. Number of Intervals This is not editable. When select Bin Ends, you can specify the space-separated values in the Bin Ends box. When select Increment, you can specify the increment (bin size) for the binning in the Increment box.
Bins There are two options in the download list: Increment and Bin Ends. Maximum Speed Specify the maximum binning level for wind speed. Minimum Speed (Calm) Specify the minimum binning level for wind speed. Specify the settings for wind speed binning. Note: When there is no calm circle, all paddles show as line.
Rows Choose the rows of the data range from which the windrose graph is plotted.įrom The first row of the range. Wind Speed Specify the data range for wind speed data. Wind Direction Specify the data range for wind direction data. The dialog of the plot_windrose X-Function Input Click OK in the dialog to create the graph.Then the dialog of the plot_windrose X-Function opens, allowing you to specify the options for creating the graph.Or Click the Wind Rose-Raw Data button on the 2D Graphs toolbar. From the menu, choose Plot > Specialized : Wind Rose-Raw Data.If there is an associated X column, X column supplies X values otherwise, sampling interval of the Y column or row number is used. The X column displays the wind direction, and the Y columns contain the wind speed values. Select one Y column (or a range from one Y column). 2.1 The dialog of the plot_windrose X-Function.