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This icon is a plotting specification for average (zonal or meridional) cross-section plots from a suitable GRIB data source. It can also take the output from an Average Data icon as an input. In this case, a consistency check is performed between the parameters that are common to both icons.

In addition to the parameters required for the average cross section computation, this icon specifies the axis details as well as the plot positioning in the plot frame of the display window / paper sheet and the overlay of different data units in the same plot.

For further details on the role and usage of View icons in the visualisation process, please see Analysis Views.

To access the computed output values use the Average Data icon.

From Macro/Python this icon can be called as mvaverageview().

Gallery Examples using Average View

The Average View Editor

Bottom Level

Specifies the lower limit of the average cross section, as a pressure level (hPa) or model level (η levels).

Top Level

Specifies the upper limit of the average cross section, as a pressure level (hPa) or model level (η levels).

Vertical Scaling

Specifies the type of vertical axis - Linear or Logarithmic.

Interpolate Values

Specifies whether to interpolate vertically the cross-section values into a regular set of interpolated vertical levels. Choosing not to interpolate returns a cross section data matrix with values at the original levels.

Note - if you need to use the cross section data in calculations further down the stream you should not interpolate.

Area

Specifies the coordinates of the area over which the average profile is calculated. Enter coordinates (lat/long) of an area separated by a "/" (top left lat and long, bottom right lat and long). Alternatively, use the coordinate assist button.

Direction

Specifies the direction along which the averaging of the variable is performed. Options are North South and East West. For North South, the averaging is weighted by cos(latitude).

Horizontal Axis

Specifies the plotting attributes of the horizontal axis. An Axis Plotting icon can be dropped here.

Vertical Axis

Specifies the plotting attributes of the vertical axis. An Axis Plotting icon can be dropped here.

Subpage X Position

Specifies the X offset of the plot from the left side of the plot frame (any subdivision of the display area). This is expressed as a percentage of the X-dimension of the plot frame.

Subpage Y Position

Specifies the Y offset of the plot from the bottom side of the plot frame (any subdivision of the display area). This is expressed as a percentage of the Y-dimension of the plot frame.

Subpage X Length

Specifies the X length of the plot. This is expressed as a percentage of the X-dimension of the plot frame. Hence the sum of this X length plus the X offset cannot exceed 100 (it is advised that it does not exceed 95 since you need some margin on the right for things like axis or map grid labels).

Subpage Y Length

As above but for the Y length of the plot.

Page Frame

Toggles the plotting of a border line around the plot frame On /Off .

Page Frame Parameters

Comprising Page Frame Colour, Page Frame Line Style and Page Frame Thickness, these parameters specify the characteristics of the plot frame border line. Only available when Page Frame is On .

Page Id Line

Toggles the plotting of plot identification line On /Off .

Page Id Line User Text

Specifies user text to be added to the plot identification line. Only available when Page Id Line is On .

Subpage Frame

Toggles the plotting of a border line around the plot itself On /Off . In most cases you will want this to be left On . When Off the sides of the plot not equipped with axis will not be plotted.

Subpage Frame Parameters

Comprising Subpage Frame Colour, Subpage Frame Line Style and Subpage Frame Thickness, these parameters specify the characteristics of the plot frame border line. Only available when Subpage Frame is On .

Subpage Background Colour

Specifies the colour of the background of the plot (i.e. not affected by visual definitions like contour shadings or lines).

 

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