vexp_i — Performs power-of operations between a vector and a scalar


Performs power-of operations between a vector and a scalar


vexp_i  ifn, ival, ielements[, idstoffset]


ifn - number of the table hosting the vectorial signal to be processed

ielements - number of elements of the vector

ival - scalar value to be added

idstoffset - index offset for the destination table


vexp_i rises kval to each element contained in a vector from table ifn, starting from table index idstoffset. This enables you to process a specific section of a table by specifying the offset and the number of elements to be processed. Offset is counted starting from 0, so if no offset is specified (or set to 0), the table will be modified from the beginning.

Negative values for idstoffset are valid. Elements from the vector that are outside the table, will be discarded, and they will not wrap around the table.

This opcode runs only on initialization, there is a k-rate version of this opcode called vexp.

In all these opcodes, the resulting vectors are stored in ifn, overriding the intial vectors. If you want to keep initial vector, use vcopy or vcopy_i to copy it in another table. All these operators are designed to be used together with other opcodes that operate with vectorial signals such as bmscan, vcella, adsynt, adsynt2, etc. They can also be useful in conjunction with the spectral opcodes pvsftw and pvsftr.


Here is an example of the vexp_i opcode. It uses the file vexp_i.csd.

Example 489. Example of the vexp_i opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

; Select audio/midi flags here according to platform
; Audio out   Audio in
-odac           -iadc     ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o cigoto.wav -W ;;; for file output any platform


	instr 1
ifn1 = p4
ival = p5
ielements = p6
idstoffset = p7
kval init 25
vexp_i ifn1, ival, ielements, idstoffset

	instr 2	;Printtable
itable = p4
isize = ftlen(itable)
kcount init 0
kval table kcount, itable
printk2 kval

if (kcount == isize) then

kcount = kcount + 1 


f 1 0 16 -7 1 16 17

i2	0.0	0.2	1
i1	0.4	0.01	1	2	3	4
i2	0.8	0.2	1
i1	1.0	0.01	1	0.5	5	-3
i2	1.2	0.2	1
i1	1.4	0.01	1	1.5	10	12
i2	1.6	0.2	1


See also

vadd, vmult_i, vpow_i and vexp_i.


Written by Gabriel Maldonado. Optional arguments added by Andres Cabrera and Istvan Varga.

New in Csound 5 (Previously available only on CsoundAV)