Question
Tutor
Posts: 6
Member Since: ‎11-11-2013
Message 1 of 6 (1,015 Views)

# HP Prime: How to Do Curl

I am trying to use the curl function on the Prime. The syntax given on p. 327 of the User Guide is

• curl([Expr1, Expr2, ..., ExprN], [Var1,Var2, ..., VarN])

and it gives the example

• curl([2*x*y,x*z,y*z],[x,y,z]) returns [z-x,0,z-2*x]

Notice that the syntax is a comma-separted list of expressions inside square brackets, followed by a comma, followed by a comma-separated list of variables. But when I try to enter the left brackets, the calculator inserts the matrix template, and I'm not able to enter the comma-separated lists. What is the exact key sequence to enter this example? Thanks.

# Re: HP Prime: How to Do Curl

Hi,

This is indeed odd. However, it can still be used by entering data in the top row only:

HTH

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PhD Student
Posts: 802
Member Since: ‎08-10-2010
Message 2 of 6 (1,002 Views)

## Re: HP Prime: How to Do Curl

Hi,

This is indeed odd. However, it can still be used by entering data in the top row only:

HTH

_________________________________________________________
Note: I do not work for HP, I just like playing with calculators :-)
Tutor
Posts: 6
Member Since: ‎11-11-2013
Message 3 of 6 (994 Views)

## Re: HP Prime: How to Do Curl

Yes, that's ugly, but it works. Thanks. I figured out that these also work:

1. Switch from textbook entry to algebraic entry. Then you can enter the example exactly as in the User Guide, including the commas.

2. Use braces. Those work, too, but I'm not sure if you're supposed to use braces for that.

PhD Student
Posts: 802
Member Since: ‎08-10-2010
Message 4 of 6 (971 Views)

## Re: HP Prime: How to Do Curl

Yes, that works too, thanks for mentioning.

By the way, there is a new firmware version available (5447, your calcutor was probably shipped with 5106). Update the Connectivity Kit on the PC (use "Check for updates") and then connect and update the calculator.

Happy calculating.

_________________________________________________________
Note: I do not work for HP, I just like playing with calculators :-)
Student
Posts: 1
Member Since: ‎01-23-2016
Message 5 of 6 (606 Views)

## Re: HP Prime: How to Do Curl

[ Edited ]

Well anyways how to enter square braces

i am very new to hp prime

if u can add the keystrokes it will be quite clear in finding curl

Professor
Posts: 2,493
Member Since: ‎02-17-2015
Message 6 of 6 (596 Views)

## Re: HP Prime: How to Do Curl

[ Edited ]

Hi!, fielboso:

Welcome, to Forum !.

For finding curl, you needed use CAS ... http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv021.cgi?read=251401

Press, ENTER key ...