Re: [O] Insert calc vector directly into spreadsheet cells?
Hi Steven On Tue, May 27, 2014 at 11:12 AM, Steven Adrian wrote: > Here is the custom calc function that is similar to subscr. It will > work for both vectors and matrices: > > (defmath getElem (indices m) > (let (i j) > (if (vectorp indices) > (progn > (setq i (cadr indices)) > (setq j (nth 2 indices)) > (nth j (nth i m)) > ) > (progn > (setq i indices) > (nth i m) > ) > ) > ) > ) > > Here is the table function to get matrix data from a table, take the > inverse, and write the result to a new table: > > #+TBLFM: > @1$1..@3$3=getElem([@#,$#],inv(arrange(remote(matrixTable,@1$2..@3$4),3)) Very nice. I didn't know the Calc function arrange([a, b, c, d], 2) to get [[a, b], [c, d]]. I always thought that when a TBLFM range spans more than one row and column like in @1$2..@2$3 it should learn to result in [[a, b], [c, d]] instead of the current [a, b, c, d]. Thanks for showing how to deal with this. Michael
Re: [O] Insert calc vector directly into spreadsheet cells?
Michael, Here is the custom calc function that is similar to subscr. It will work for both vectors and matrices: (defmath getElem (indices m) (let (i j) (if (vectorp indices) (progn (setq i (cadr indices)) (setq j (nth 2 indices)) (nth j (nth i m)) ) (progn (setq i indices) (nth i m) ) ) ) ) Here is the table function to get matrix data from a table, take the inverse, and write the result to a new table: #+TBLFM: @1$1..@3$3=getElem([@#,$#],inv(arrange(remote(matrixTable,@1$2..@3$4),3)) Thanks for the tip about orgtbl-ascii-plot. I have been working on a set of notes about using calc and org mode that I am migrating over to read more like a tutorial, and I am now thinking about changing the histogram example to use orgtbl-ascii-plot instead of just writing the bin values in a table. Steven On May 26, 2014, at 4:43 PM, Michael Brand wrote: > Hi Steven > > On Mon, May 26, 2014 at 9:39 PM, Steven Adrian > wrote: >> This is great. I wish I had seen this earlier. I did not know about >> the subscr function, but I had basically gotten to the same point by >> writing an equivalent custom calc function. > > With the Calc function defmath? How does it look like? > >> 1. I wrote a custom calc function called tailsInARow that uses the >> calc random function to simulate a coin toss and return the number >> of tails in a row. I used this function to fill a 20x20 table of >> values. I then used the calc histogram function in a table formula >> to read the table values, histogram the number of tails in a row, >> then write the histogram to a new table. > > Didn't know that Calc has a histogram function. The histogram values > would fit perfectly to the ASCII plot within an Org table: > http://orgmode.org/worg/org-contrib/orgtbl-ascii-plot.html > >> 2. I calculated a rotation matrix as a succession of individual >> rotations about x, y, and z axes. I then wrote the resulting matrix >> to a table. I then wrote a table function to read the matrix, take >> the inverse, and write the result to a new table. > > Interesting. How does the "function to read the matrix" look like? > > Michael >
Re: [O] Insert calc vector directly into spreadsheet cells?
Michael, This is great. I wish I had seen this earlier. I did not know about the subscr function, but I had basically gotten to the same point by writing an equivalent custom calc function. I understand that using a calc function in a table formula is inefficient, since it is executed for every table cell. But for small tables, I think the combination of table formulas and calc functions is extremely powerful. Here are two examples of mine: 1. I wrote a custom calc function called tailsInARow that uses the calc random function to simulate a coin toss and return the number of tails in a row. I used this function to fill a 20x20 table of values. I then used the calc histogram function in a table formula to read the table values, histogram the number of tails in a row, then write the histogram to a new table. 2. I calculated a rotation matrix as a succession of individual rotations about x, y, and z axes. I then wrote the resulting matrix to a table. I then wrote a table function to read the matrix, take the inverse, and write the result to a new table. I think calc is well suited for small problems like this for which I want to have a record of what I did later. But I am always looking for better approaches, if you have any to suggest. Steven On May 21, 2014, at 3:29 AM, Michael Brand wrote: > Hi Steven > >> Steven Adrian writes: >>> #+TBLFM: @1$1..@1$10=index(10) >>> >>> But the formula above just puts the whole vector in each cell. Can anyone >>> tell me how to put the vector values in individual cells? > > The vector elements can be accessed with Calc subscr() and Org "field > coordinates": > http://orgmode.org/manual/References.html > > | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | > #+TBLFM: @1$1..@1$10 = subscr(index(10), $#) > > In a TBLFM I would not use Calc vector functions like index() but a > calculation of $#, here simply f(x) = x: > > | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | > #+TBLFM: @1$1..@1$10 = $# > > Or is there an interesting Calc vector function that is not easy to > mimic? > > Michael >
Re: [O] Insert calc vector directly into spreadsheet cells?
Hi Steven On Mon, May 26, 2014 at 9:39 PM, Steven Adrian wrote: > This is great. I wish I had seen this earlier. I did not know about > the subscr function, but I had basically gotten to the same point by > writing an equivalent custom calc function. With the Calc function defmath? How does it look like? > 1. I wrote a custom calc function called tailsInARow that uses the > calc random function to simulate a coin toss and return the number > of tails in a row. I used this function to fill a 20x20 table of > values. I then used the calc histogram function in a table formula > to read the table values, histogram the number of tails in a row, > then write the histogram to a new table. Didn't know that Calc has a histogram function. The histogram values would fit perfectly to the ASCII plot within an Org table: http://orgmode.org/worg/org-contrib/orgtbl-ascii-plot.html > 2. I calculated a rotation matrix as a succession of individual > rotations about x, y, and z axes. I then wrote the resulting matrix > to a table. I then wrote a table function to read the matrix, take > the inverse, and write the result to a new table. Interesting. How does the "function to read the matrix" look like? Michael
Re: [O] Insert calc vector directly into spreadsheet cells?
Hi Steven > Steven Adrian writes: >> #+TBLFM: @1$1..@1$10=index(10) >> >> But the formula above just puts the whole vector in each cell. Can anyone >> tell me how to put the vector values in individual cells? The vector elements can be accessed with Calc subscr() and Org "field coordinates": http://orgmode.org/manual/References.html | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | #+TBLFM: @1$1..@1$10 = subscr(index(10), $#) In a TBLFM I would not use Calc vector functions like index() but a calculation of $#, here simply f(x) = x: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | #+TBLFM: @1$1..@1$10 = $# Or is there an interesting Calc vector function that is not easy to mimic? Michael
Re: [O] Insert calc vector directly into spreadsheet cells?
Hi Steven, Steven Adrian writes: > #+TBLFM: @1$1..@1$10=index(10) Table formulas apply to individual fields, not to a range of fields. > But the formula above just puts the whole vector in each cell. Can anyone > tell me how to put the vector values in individual cells? AFAIU you will need several TBLFM lines for this. HTH, -- Bastien
[O] Insert calc vector directly into spreadsheet cells?
I would like to insert a calc vector directly into a range of spreadsheet cells from a function. As a specific example, consider the calc index function, which returns a calc vector of integers from 1 to n. Once calc has started within an emacs session, the index function can be accessed from within the scratch buffer as: (calcFunc-index 10) If the above function is evaluated, the echo area will display the calc vector returned by the function: (vec 1 2 3 4 5 6 7 8 9 10) I would like to put these values into a range of cells with a table formula like: #+TBLFM: @1$1..@1$10=index(10) But the formula above just puts the whole vector in each cell. Can anyone tell me how to put the vector values in individual cells?
