Difference between revisions of "RvsZ3"
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Assignment can also be made using the function ASSIGN(). An equivalent way of making the same assignment as above is with: | Assignment can also be made using the function ASSIGN(). An equivalent way of making the same assignment as above is with: | ||
In R, | In R, | ||
| − | > assign("x", c(10.4, 5.6, 3.1, 6.4, 21.7)) | + | > assign("x", c(10.4, 5.6, 3.1, 6.4, 21.7)) |
In Z3 to use the "ASSIGN" function as: | In Z3 to use the "ASSIGN" function as: | ||
| − | ASSIGN("x", [10.4, 5.6, 3.1, 6.4, 21.7]) | + | ASSIGN("x", [10.4, 5.6, 3.1, 6.4, 21.7]) |
Assignments can also be made in the other direction, using the obvious change in theassignment operator. | Assignments can also be made in the other direction, using the obvious change in theassignment operator. | ||
| Line 28: | Line 28: | ||
> 1/x | > 1/x | ||
In Z3, We can use the function called Reciprocal, | In Z3, We can use the function called Reciprocal, | ||
| − | '''RECIPROCAL(x)''' (the value of x is [10.4, 5.6, 3.1, 6.4, 21.7] | + | '''RECIPROCAL(x)''' (the value of x is [10.4, 5.6, 3.1, 6.4, 21.7] |
Also we can use directly, | Also we can use directly, | ||
| Line 34: | Line 34: | ||
The further assignment | The further assignment | ||
| − | > y <- c(x, 0, x) | + | > y <- c(x, 0, x) |
would create a vector y with 11 entries consisting of two copies of x with a zero in the | would create a vector y with 11 entries consisting of two copies of x with a zero in the | ||
middle place. | middle place. | ||
Revision as of 00:28, 7 July 2021
Comparison of R vs Z3
Simple manipulations; numbers and vectors
Vectors and assignment
Z3 operates on named data structures. The simplest such structure is the numeric vector,which is a single entity consisting of an ordered collection of numbers.
To set up a vector named x, say, consisting of five numbers, namely 10.4, 5.6, 3.1, 6.4 and 21.7, use the R command
> x <- c(10.4, 5.6, 3.1, 6.4, 21.7)
Z3 command to set up a vector is: x<==[10.4, 5.6, 3.1, 6.4, 21.7];
Alternatively we can use the simple "=" also.
x=[10.4, 5.6, 3.1, 6.4, 21.7]
Assignment can also be made using the function ASSIGN(). An equivalent way of making the same assignment as above is with: In R,
> assign("x", c(10.4, 5.6, 3.1, 6.4, 21.7))
In Z3 to use the "ASSIGN" function as:
ASSIGN("x", [10.4, 5.6, 3.1, 6.4, 21.7])
Assignments can also be made in the other direction, using the obvious change in theassignment operator. So the same assignment could be made using
[10.4, 5.6, 3.1, 6.4, 21.7]==>x
The reciprocals of the above five values for x in R, > 1/x In Z3, We can use the function called Reciprocal,
RECIPROCAL(x) (the value of x is [10.4, 5.6, 3.1, 6.4, 21.7]
Also we can use directly,
([10.4,5.6,3.1,6.4,21.7]<>d40)@(x=>1/x)
The further assignment
> y <- c(x, 0, x)
would create a vector y with 11 entries consisting of two copies of x with a zero in the middle place.
Vector arithmetic
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