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...for Meadow and none for Scrub =20 worms[rev(order(Worm.density)),] [!duplicated(Vegetation),] Field.Name Area Slope Vegetation Soil.pH Damp Worm.density 9 The.Orchard 1.9 0 Orchard 5.7 FALSE 9 16 Water.Meadow 3.9 0 Meadow 4.9 TRUE 8 10 Rookery.Slope 1.5 4 Grassland 5.0 TRUE 7 2 Silwood.Bottom 5.1 2 Arable 5.2 FALSE 7 4 Rush.Meadow 2.4 5 Meadow 4.9 TRUE 5 and here is the correct set of rows, but in the wrong order, using unique =20 worms[rev(order(Worm.density)),...

Hi all, I'm here again with my newbies questions :( I have a simple example: count of slugs in two fields. I need to make a barplot with mean and SE of mean. So I have: The mean: > tapply(slugs,field,mean) Nursery Rookery 1.275 2.275 The SE: > tapply(slugs,field,sd)/sqrt(tapply(slugs,field,length)) Nursery Rookery 0.3651264 0.3508004 If the data has been normally distributed it is correct, but it is overdipersed count data. I make a model > m.poisson <- glm(slugs~field,family=quasipoisson)...

...F 6 10 Oak.Mead 3.1 2 Grassland 3.9 F 2 11 Church.Field 3.5 3 Grassland 4.2 F 3 12 Ashurst 2.1 0 Arable 4.8 F 4 13 The.Orchard 1.9 0 Orchard 5.7 F 9 14 Rookery.Slope 1.5 4 Grassland 5 T 7 15 Garden.Wood 2.9 10 Scrub 5.2 F 8 16 North.Gravel 3.3 1 Grassland 4.1 F 1 17 South.Gravel 3.7 2 Grassland 4 F 2 18 Observatory.Ridge 1.8 6 Grass...

...would be grateful. Neil. Mulberry would like to take this opportunity to make you aware of an important change which will be taking place as of Monday 10th July 2006. Mulberry''s head office currently at Kilver Court, Shepton Mallet will be re-locating to the following address: The Rookery, Chilcompton, Somerset, England, BA3 4EH. Main telephone number: 01761 234500. Individual contacts should be making you aware of their new phone numbers shortly. This E-mail and any attachments are confidential to the addressee and may contain copyright material. Any opinions expressed within...