Draw a random number

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1

Hello,

I am trying to draw a random number between 1 and 5 (inclusive). The point would be to make certain questions relevant based on this draw. Any help would be greatly appreciated.

Thanks,

TK

2

You can do *random()5 in calculation of field: calculate

random() output random number in [0,1]. XFORM does the rounding to integer.

··· On Wednesday, 30 September 2015 20:46:18 UTC+1, Tanu Kumar wrote: > > Hello, > > I am trying to draw a random number between 1 and 5 (inclusive). The point > would be to make certain questions relevant based on this draw. Any help > would be greatly appreciated. > > Thanks, > > TK
3

I think you are close, Hung.

The traditional way of doing this is: floor(random() * (max - min + 1)) + min.

JavaROSA doesn't have floor, so you can do it like: int(random() *
(max - min + 1)) + min.

Caveat is this only works if you are expecting positive numbers from
random() * (max - min + 1).

Yaw

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On Fri, Oct 2, 2015 at 5:25 AM, Hung Pham hpham2709@gmail.com wrote:

You can do random()*5 in calculation of field: calculate

random() output random number in [0,1]. XFORM does the rounding to integer.

On Wednesday, 30 September 2015 20:46:18 UTC+1, Tanu Kumar wrote:

Hello,

I am trying to draw a random number between 1 and 5 (inclusive). The point
would be to make certain questions relevant based on this draw. Any help
would be greatly appreciated.

Thanks,

TK

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4

Nice. I learn something new today.

Thanks Yaw.

Should start looking into JavaROSA source code soon.

Hung

5

Hung,

One easy contribution is for you to add floor() and ceil() to the
JavaROSA code. Give it a try!

Yaw

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On Fri, Oct 2, 2015 at 3:47 PM, Hung Pham hpham2709@gmail.com wrote:

Nice. I learn something new today.

Thanks Yaw.

Should start looking into JavaROSA source code soon.

Hung

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6

Yaw,

I will give it a try and report back for result.

Hung.

7

And whenever you use random(), you should wrap it with once()

··· On Fri, Oct 2, 2015 at 2:17 AM, Hung Pham wrote:

Yaw,

I will give it a try and report back for result.

Hung.

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Mitch Sundt
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8

Search the list for once( or random( for earlier posts

··· On Tue, Oct 6, 2015 at 5:19 PM, Mitch Sundt wrote:

And whenever you use random(), you should wrap it with once()

On Fri, Oct 2, 2015 at 2:17 AM, Hung Pham hpham2709@gmail.com wrote:

Yaw,

I will give it a try and report back for result.

Hung.

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Mitch Sundt
Software Engineer
University of Washington
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