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Hi everyone, I''m new to Rails and Ruby, and have been working my way through the Pickaxe and Agile Rails books for the last week or so. With a background in payroll apps I found that the default ActiveRecord mapping of decimal columns to float variables really bothered me! Financial calcs need high levels of accuracy and floats just don''t give you that. I know there are a bunch

I have a form below a table to add new notes to an item. If the note does not have a title or body, the note is not saved and a form error is displayed. However, if the note validates successfully, then the note is added to the bottom of the table above. Just for reference, the table id is "note_list" and the add form div is id="note_add_form". So, my problem/question

We have two lectureship positions advertised at the moment. One (or both) of these is intended for a specialist in statistical computation. The salary doesn't look great by international standards but there are compensations: housing is cheap, the air is clean, and the worlds problems are far away. We also have a track record of getting tenure for computing people.

Hi, Is there an easy way of querying an active record for a maximum column value? I need to do queries like: SELECT MAX(salary) FROM employees TIA, Jeroen

I have the data similar to the following in a data frame: LastName Department Salary 1 Johnson IT 56000 2 James HR 54223 3 Howe Finance 80000 4 Jones Finance 82000 5 Norwood IT 67000 6 Benson Sales 76000 7 Smith Sales 65778 8 Baker HR 56778 9 Dempsey HR 78999 10 Nolan

Hi, is there an R function like sql's TOP key word? I have a dataframe that has 3 columns: company, person, salary How do I get top 5 highest paid person for each company, and if I have fewer than 5 people for a company, just return all of them? Thanks, Richard [[alternative HTML version deleted]]

Hopefully this is an easy problem... I'm trying to add a partitioned rank column to a data frame where the rank is calculated separately across a partition by categories, the way you could easily do in SQL. I found this solution in the archives that looked like it might work: http://tolstoy.newcastle.edu.au/R/e11/help/10/09/8675.html The example has a data frame with several car companies,

Hi, netters, First of all, thanks a lot for all the prompt replies to my earlier question about "merging" data frames in R. Actually that's an equivalence to the "join" clause in mysql. Now I have another question. Suppose I have a data frame X with lots of columns/variables: Name, Age,Group, Type, Salary. I wanna do a subtotal of salaries: aggregate(X$Salary,

I am facing a problem with a function in survey package. The function svyvar gives the estimated population variance from a given sampling scheme. I am working with a data having more than four continuous variables. In order to have have population total for all those cont. variables I have written in the following format svyvar(~var1+var2+var3+var4+var5+var6,data) ; var1,var2,...,var6 are 6

The dataframe is id salary 100 500 101 600 102 700 103 800 how can i generate a subsets if salary>600? -- View this message in context: http://r.789695.n4.nabble.com/Filtering-in-R-tp2299603p2299603.html Sent from the R help mailing list archive at Nabble.com.

Plotting with 2 x axis? One axis inside another, for example salary within state, 1-50 | 50 ? 100 | 100+ | 1- 50 | 50 -100 | 100+ | ? repeated bins for salary AL ! AR ?? more states The values are all stored with a single data frame. I have tried different things with the axis function and done many

Dear "R Gurus", I am having two dummy csv data sets A and B containing 19 and 15 cases/observations respectively. From the two data set 13 cases are intersection. From one of the two (any) data set, How do I then retrieve the unmerged data ? let's take A for example, six cases must appear in our results. See the R codes below. Please assist. Looking forward to hearing

I have a string like this st <- "SELECT COUNT(empid), COUNT(mgrid), COUNT(empname), COUNT(salary), FROM Employees" How can I remove the last comma before the FROM statement? -J

Hello I am a Ruby newbie, thus a rather simple question. My list view shows table records and enables user to click a button in order to change value of one attribute in given record. I use this code to invoke a method from controller: <%= button_to "Change", { :action => "edit", :id => prog.id_prog } %> My method looks like this (just a simple one - to set the

Hello all. I have the following: plot(salaries$yearID, salaries$salary, type='n', xaxt='n', xlab='', yaxt='n', ylab='') axis(1, at=unique(salaries$yearID), labels=unique(salaries$yearID), lwd=.25, tck=-0.05) axis(2, axTicks(2), format(axTicks(2), scientific = F)) Which nicely creates the Y axis with the raw numbers, which are in the range of .5 - 7

Hi, how can I get Rails to generate SQL queries with conditions in the JOIN clause? What I would want is: SELECT * FROM people p LEFT OUTER JOIN jobs j (p.job_id = j.id AND j.salary > 9999999) I tried People.find(:all, :include => ''jobs'', :conditions => ''jobs.salary > 9999999'') but that generates SELECT * FROM people p LEFT OUTER

Mydata is as under. dat=" salary ex + 1 1856 1799 + 2 1856 1800 + 3 1858 1800 + 4 1858 1801 + 5 1862 1803 + 6 1862 1805 + 7 1862 1810 + 8 1865 1805 + 9 1865 1808 + 10 1865 1815 + 11 1865 1820 + 12 1870 1810 + 13 1870 1830 + 14 1880 1840 + 15 1880 1845 + 16 1880 1851 + 17 1880 1853 + 18 1880 1855 + 19 1885 1850 + 20 1885 1852 + 21 1885 1857 + 22 1885 1860 + 23

How do you label Xtick and Ytick marks with Currency symbols: $2000 instead of 2000? I would like to add dollar symbols to tickmarks on boxplots, histograms and back-to-back histograms. My Examples (requiring the lattice and Hmisc packages): data(case0102, package="Sleuth2") str(case0102) boxplot(Salary~Sex, case0102) histogram(~ Salary | Sex, data=case0102) require(Hmisc) #

Friends- I have taken a new job and will be moving at the end of March. The newspaper I currently work for is looking for someone to take my place. I have really enjoyed working here. It is a great environment with very nice people to work with. And the best part is you get to develop in Ruby and Rails, for everything! The paper is willing to accept applications from people who would

I'm trying to impute data using the mi package, but after running through almost the entire first round of imputations (which takes quite a while), it throws this error (I'll include the whole output prior to the error for context). Does anyone know what is causing it, or how I can fix it? More specifically, how can I tell what is throwing the error so I know what to fix? Is