HP Prime: adding an entry to a vector  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: HP Prime: adding an entry to a vector (/thread257438.html) 
HP Prime: adding an entry to a vector  Alberto Candel  12012013 Hi, How do you add an entry to a vector (like going from [1,2] to [1,2,3])? ADDCOL for matrices does not work for vectors because (row) vectors are not matrices for the Prime (a matrix has at least 2 rows). And even if ADDCOL worked, it would not add an entry at the end of the vector.
Thank you! Edited: 1 Dec 2013, 2:09 p.m. after one or more responses were posted
Re: HP Prime: adding an entry to a vector  Terje Vallestad  12012013 I think append will do it Example: append([1,2,3],4) gives [1,2,3,4] Cheers,
Terje
Re: HP Prime: adding an entry to a vector  cyrille de BrĂ©bisson  12022013 ADDROW(vector, value, column) will do what you want...
cyrille
Re: HP Prime: adding an entry to a vector  Alberto Candel  12022013 Thanks Terje and Cyrille,
APPEND does what I wanted, ADDROW does not seem to work ADDROW([1,2],3,3) results in error. Same with ADDCOL.
Re: HP Prime: adding an entry to a vector  Terje Vallestad  12022013 Hi, From exprimentation and seeing other similar issues by others On this forum I think you need to enclose the 3 in tickmarks. I.e. ADDROW([1,2],'3',3) results in [1,2,3] ADDCOL([1,2],'3',3) also results in [1,2,3] Cheers,
Terje
Re: HP Prime: adding an entry to a vector  Michael de Estrada  12022013 What I've found is that you can't use matrix operations on a vector. A vector is designated by a single set of square brackets, e.g. [1,2,3], whereas a single row matrix will be [[1,2,3]]. If you do Shift 4 (Matrix), you will see the vector appear as dimension 3, whereas the matrix will appear as 1X3.
Re: HP Prime: adding an entry to a vector  Alberto Candel  12022013 Yes, a matrix in the prime must have at least 2 rows, according to the user guide. The commands ADDCOL([1,2],'3',3) do not seem to work for me. Thanks.
Re: HP Prime: adding an entry to a vector  Terje Vallestad  12022013 Hi, I think you will find if you try using the additional argument enclosed in tick marks, you keep the vector format in the result even if you are using matrix commands Cheers,
Terje
Re: HP Prime: adding an entry to a vector  Michael de Estrada  12022013 It doesn't need two rows; it just needs two separate dimensions. So if you have a vector v:=[1,2,3], then v(2) would return 2, whereas in a matrix m:=[[1,2,3]], m(1,2) would return 2.
Edited: 2 Dec 2013, 1:54 p.m.
Re: HP Prime: adding an entry to a vector  Terje Vallestad  12022013 Hi, I got it to work in Home, not in CAS Cheers,
Terje
Re: HP Prime: adding an entry to a vector  Alberto Candel  12022013 Ok, yes, it does work in Home. I was in CAS. thanks.
Re: HP Prime: adding an entry to a vector  Michael de Estrada  12022013 But why go to all this trouble ? If you just stick with matrix form throughout, everything works fine and can be done in both Home and CAS view. Just like whenever I use CAS operations inside programs, which is basically the same as Home view, then I just place them inside a CAS(" ") command. Edited: 2 Dec 2013, 12:37 p.m.
Re: HP Prime: adding an entry to a vector  Alberto Candel  12022013 Oh well, now I got it! This works ADDCOL([[1,2]],[3],3) gives [1,2,3] in CAS.
Thank you all!
