Sin (Image Analyst)

Available with Spatial Analyst license.

Summary

Calculates the sine of cells in a raster.

Illustration

OutRas = Sin(InRas)

Usage

• In mathematics, all trigonometric functions have a defined range of valid input values called the domain. The output values from each function also have a defined range. For this tool, the following are true:

  • The Domain is: -∞ < [in_value] < ∞

  • The Range is: -1 ≤ [out_value] ≤ 1

  Note that -∞ and ∞ represent the smallest negative and largest positive values supported by the particular raster format, respectively.

• The input values for this tool are interpreted to be in radians. If the input you want to use is in degrees, the values must first be divided by the radians-to-degrees conversion factor of 180/pi, or approximately 57.296.

  For further assistance, a procedure to follow and examples of converting input values in degrees to radians are available.

• The output values from this tool are interpreted as unitless.

• Output values are always floating point, regardless of the input data type.

• Due to the range of values, applying a linear stretch renderer can be useful to better see the results.

• If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.

• If the input is multidimensional raster data, all slices from all variables will be processed. The output will be a multidimensional raster in CRF format.

Parameters

Dialog

Label	Explanation	Data Type
Input raster or constant value	The input for which to calculate the sine values. To use a number as an input for this parameter, the cell size and extent must first be set in the environment.	Raster Layer; Constant

Return Value

Label	Explanation	Data Type
Output raster	The output raster. The values are the sine of the input values.	Raster

Python

Sin(in_raster_or_constant)

Name	Explanation	Data Type
in_raster_or_constant	The input for which to calculate the sine values. To use a number as an input for this parameter, the cell size and extent must first be set in the environment.	Raster Layer; Constant

Return Value

Name	Explanation	Data Type
out_raster	The output raster. The values are the sine of the input values.	Raster

Code sample

Sin example 1 (Python window)

This example calculates the sine of the values in the input Grid raster.

import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outSin = Sin("degs")
outSin.save("C:/iapyexamples/output/outsin")

Sin example 2 (stand-alone script)

This example calculates the sine of the values in the input Grid raster and outputs an IMG raster.

# Name: Sin_Ex_02.py
# Description: Calculates the sine of pixels in a raster
# Requirements: Image Analyst Extension

# Import system modules
import arcpy
from arcpy import env
from arcpy.ia import *

# Set environment settings
env.workspace = "C:/iapyexamples/data"

# Set local variables
inRaster = "degs"

# Check out the ArcGIS Image Analyst extension license
arcpy.CheckOutExtension("ImageAnalyst")

# Execute Sin
outSin = Sin(inRaster)

# Save the output 
outSin.save("C:/iapyexamples/output/outsin.img")

Environments

Auto Commit, Cell Size, Cell Size Projection Method, Current Workspace, Extent, Geographic Transformations, Mask, Output CONFIG Keyword, Output Coordinate System, Scratch Workspace, Snap Raster, Tile Size