rurihabachi.com - Web API

Function(x) - Web API

This API calculates a provided function(x) with a given range of x, and returns calculated numerical values.

» Check also the feature of this API: go to Functional Calculator - f(x) page (math tool).

To use this API, access to the URLs listed below.
Each Web API returns XML / JSON (JSONP) / CSV data.

XML	http://www.rurihabachi.com/web/webapi/functionx/xml
JSON/JSONP	http://www.rurihabachi.com/web/webapi/functionx/json
CSV	http://www.rurihabachi.com/web/webapi/functionx/csv

» See also How to use Web API page.

Parameters: (*required)

fx *	string	a function(x) (e.g. x^2+x+2) - valid characters (x is a variable, a, b, and c are constants): 1234567890+-*/()^,pi,e,sqrt,log,abs,sin,cos,tan,a,b,c,x
xfrom	string	a start value of x (e.g. -10)
xto	string	an end value of x (e.g. 10)
xspan	string	a span of x values (e.g. 1)
a	string	a value of a
b	string	a value of b
c	string	a value of c
callback	string	a callback function name (e.g. setResult) - valid only JSONP

Return values:

function	string	a recognized function of x (might have a different form from the submited function). e.g. x^2+x+2, ax+b
avalue	string	a value of a (empty if value of a is not set)
bvalue	string	a value of b (empty if value of b is not set)
cvalue	string	a value of c (empty if value of c is not set)
status	integer	0:OK(calculated), 1 - 999:error
message	string	an error message etc.
count	integer	the number of the result value sets
valuelist/value	-	result value sets (empty if status is not 0)
xvalue	string	a value of x e.g. 3.0, 1.1*10^12
functionvalue	string	a calculated value e.g. 14.0, 2.893726238034*10^(-13)

* * *

Return data samples:

XML

<?xml version="1.0" encoding="UTF-8"?>

<result function="functionx">
  <function>ax+b</function>
  <avalue>2.0</avalue>
  <bvalue>3.0</bvalue>
  <cvalue></cvalue>
  <status>0</status>
  <message>OK</message>
  <count>5</count>
  <valuelist>
    <value>
      <xvalue>-10.0</xvalue>
      <functionvalue>-17.0</functionvalue>
    </value>
    <value>
      <xvalue>-5.0</xvalue>
      <functionvalue>-7.0</functionvalue>
    </value>
    <value>
      <xvalue>0.0</xvalue>
      <functionvalue>3.0</functionvalue>
    </value>
    <value>
      <xvalue>5.0</xvalue>
      <functionvalue>13.0</functionvalue>
    </value>
    <value>
      <xvalue>10.0</xvalue>
      <functionvalue>23.0</functionvalue>
    </value>
  </valuelist>
</result>

JSON(JSONP)

{"function":"ax+b","avalue":"2.0","bvalue":"3.0","cvalue":"","status":0,"message":"OK"
,"count":5,"valuelist":[{"xvalue":"-10.0","functionvalue":"-17.0"}
,{"xvalue":"-5.0","functionvalue":"-7.0"},{"xvalue":"0.0","functionvalue":"3.0"}
,{"xvalue":"5.0","functionvalue":"13.0"},{"xvalue":"10.0","functionvalue":"23.0"}]}

CSV

"ax+b","2.0","3.0","",0,"OK",5
"-10.0","-17.0"
"-5.0","-7.0"
"0.0","3.0"
"5.0","13.0"
"10.0","23.0"