Plotting wind speed and direction on a compass?

W

WalterKiwi

Hi, I have wind velocity (m/s) and direction (degrees) from a weather station
and want to plot it with the direction plotted around a 360 degree circle
(compass?) with the wind represented by an arrow pointing at the appriate
direction, and it's force by the length of the arrow. Sample data might be
Direction velocity
340 2.1
310 5.2
(and there's date and time data also) Any way to do this? It's hourly data
for 4 distinct weeks of the year (2 Sept, 2 Nov) for a 5 year period.
Rgds.
Walter
 
L

Lori

Try an XY chart with straight lines between points. Here's a start...
Choose Insert > Names > Define:

Direction:=Sheet1!$A$2:$A$3
Velocity:=Sheet1!$B$2:$B$3
x: =Velocity*COS(RADIANS(Direction))*{0,1}
y: =Velocity*SIN(RADIANS(Direction))*{0,1}

Edit the chart series formula to show x and y:

=SERIES(,Sheet1!y,Sheet1!x,1)

and remove any gridlines and axes markings.
 
W

WalterKiwi

Thanks Lori
Trying to do this with excel07, and not having a lot of success. Defined
direction and velocity, defined x and y. selected the series, went to formula
bar to change =series((etc)) and it sits there laughing at me. (well, it does
nothing)
Any hints for Office 2007 sufferers?
Walter
 
L

Lori

I don't have any experience with office 2007 i'm afraid. I would suggest
first creating a scatter using direction and velocity for the x and y values,
then change the source data to refer to "sheet!x" and "sheet!y" where "sheet"
is the sheet name.
 
W

WalterKiwi

Hi Lori,
Thanks - this is the type of plot I'm after - Will have a go and see what
happens.. Will let you know.
W
 
W

WalterKiwi

Hi Lori,
it worked, but it's a bit frustrating - really trying to plot 12 h of data,
but lots of hours the wind comes from the same direction and changing "series
1" to the appropriate time is no fun. May end up filing this in the "too
hard basket" for the benefit derived.
Cheers,
Walter
 
C

C G

Lori - I have the same need that you described. Were you able to get your problem figured out? If so, would you mind sharing your workbook?

Much thanks!




WalterKiw wrote:

Hi Lori,it worked, but it's a bit frustrating - really trying to plot 12 h of
18-Mar-08

Hi Lori
it worked, but it's a bit frustrating - really trying to plot 12 h of data,
but lots of hours the wind comes from the same direction and changing "series
1" to the appropriate time is no fun. May end up filing this in the "too
hard basket" for the benefit derived
Cheers
Walte

:

Previous Posts In This Thread:

Plotting wind speed and direction on a compass?
Hi, I have wind velocity (m/s) and direction (degrees) from a weather station
and want to plot it with the direction plotted around a 360 degree circle
(compass?) with the wind represented by an arrow pointing at the appriate
direction, and it's force by the length of the arrow. Sample data might b
Direction velocit
340 2.
310 5.
(and there's date and time data also) Any way to do this? It's hourly data
for 4 distinct weeks of the year (2 Sept, 2 Nov) for a 5 year period
Rgds
Walter

Try an XY chart with straight lines between points. Here's a start...
Try an XY chart with straight lines between points. Here's a start..
Choose Insert > Names > Define

Direction:=Sheet1!$A$2:$A$
Velocity:=Sheet1!$B$2:$B$
x: =Velocity*COS(RADIANS(Direction))*{0,1
y: =Velocity*SIN(RADIANS(Direction))*{0,1

Edit the chart series formula to show x and y

=SERIES(,Sheet1!y,Sheet1!x,1

and remove any gridlines and axes markings

:

Thanks LoriTrying to do this with excel07, and not having a lot of success.
Thanks Lor
Trying to do this with excel07, and not having a lot of success. Defined
direction and velocity, defined x and y. selected the series, went to formula
bar to change =series((etc)) and it sits there laughing at me. (well, it does
nothing)
Any hints for Office 2007 sufferers
Walte

:

I don't have any experience with office 2007 i'm afraid.
I don't have any experience with office 2007 i'm afraid. I would suggest
first creating a scatter using direction and velocity for the x and y values,
then change the source data to refer to "sheet!x" and "sheet!y" where "sheet"
is the sheet name

:

RE: Plotting wind speed and direction on a compass?
Try this example
http://www.freefilehosting.net/download/3dib

Insert extra lines inside the data range and the chart lines should update
you need to update the labels manually though.

Hi Lori,Thanks - this is the type of plot I'm after - Will have a go and see
Hi Lori
Thanks - this is the type of plot I am after - Will have a go and see wha
happens.. Will let you know


:

Hi Lori,it worked, but it's a bit frustrating - really trying to plot 12 h of
Hi Lori
it worked, but it's a bit frustrating - really trying to plot 12 h of data,
but lots of hours the wind comes from the same direction and changing "series
1" to the appropriate time is no fun. May end up filing this in the "too
hard basket" for the benefit derived
Cheers
Walte

:

Re: Plotting wind speed and direction on a compass?
Hi

You may find this helpful
http://www.andypope.info/charts/polarplot2.ht

Or this addi
http://www.andypope.info/charts/polarplot.ht

Do you know of any sites that have examples of the chart look you are after

Cheer
And

--

Andy Pope, Microsoft MVP - Exce
http://www.andypope.inf

EggHeadCafe - Software Developer Portal of Choice
Build a Google Search VS.Net IDE Macro
http://www.eggheadcafe.com/tutorial...25-924302fe7151/build-a-google-search-vs.aspx
 

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