Thomas, yes this is sort of possible, the problem is i'm not sure about what is meant by frequency.
to upscale the points onto a grid is straightforward tho: 1 create your table of points (say MYPOINTS) 2 Use the Gridmaker tool (look in the toolbox) to make an overlying grid, but then 'save as' the grid as a permanent table (say mygrid) 3 Now use the menu Table > Maintenance>Tablestructure to add a new column to MYGRiD called Student_count (integer) 4 now use menu Table> update column and set the Student_count column of MYGriD to Count the number of Objects MYGRiD intersects in MYPOINTS (With the 'JOIN' button, set the join to be object in Mygrid intersects obj in MYPOINTS) You will now have a MyGrid popuated with a count of students per grid square, you can then colour this using the standard thematic tools...but this doesnt give 'frequency' (frequency of what?....), so you can colour by say ' most populated cells' etc etc. If you want to plot a frequency of the student_count you can write a query along the lines of select Round(Student_count,1)"MyBin",Count(*) from Mygrid order by col1 group by col1 into MyFreq you can then graph myfreq to show the districbution of Student counts through Mygrid (no idea why you'd do this tho) (you may want to experiment with tehrounding number, so change it from say 1 to 10 or 100 or whatever) If you really are after 'density analysis' then you need a package that will do kerning etc... anyway...all students are medieval....I speak from personal experience of course.... R -----Original Message----- From: Thomas Schmid [mailto:[EMAIL PROTECTED] Sent: 21 June 2004 16:53 To: [EMAIL PROTECTED] Subject: MI-L grids again many thanks to all of you who took the time to suggest some spatial analysis tool or other to me. however, those tools are rather too sophisticated for my purposes (i.e. lacking proper statistical background knowledge I'm too daft to use them properly). here's my problem: I got about 50.000 medieval students from all over central Europe, i.e. their places of origin, i.e. points on the map. now I'd like to put a grid over my map, have the points per cell calculated, and the cells coloured according to frequency. hints or instructions how to do this with MapInfo 6.5 (and whatever additional tool) will be greatly appreciated. would MapInfo 7.5 be able to perform the above operation on its own? regards Thomas Buero: Thomas Schmid, Historisches Institut der Universitaet Bern, Abteilung Mittelalter (B 245), Laenggassstrasse 49, CH-3000 Bern 9 Tel.: 031 631 37 42, e-mail: [EMAIL PROTECTED] Privat: Thomas Schmid, Untermattweg 74, CH-3027 Bern Tel.: 031 992 14 33 --------------------------------- Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! ********************************************************************* This e-mail message, and any files transmitted with it, are confidential and intended solely for the use of the addressee. If this message was not addressed to you, you have received it in error and any copying, distribution or other use of any part of it is strictly prohibited. Any views or opinions presented are solely those of the sender and do not necessarily represent those of the British Geological Survey. The security of e-mail communication cannot be guaranteed and the BGS accepts no liability for claims arising as a result of the use of this medium to transmit messages from or to the BGS. . http://www.bgs.ac.uk ********************************************************************* --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12325
