Displaying 20 results from an estimated 31 matches for "trigonometr".
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trigonometry
2016 Nov 07
2
About trigonometric Instructions
HI developers,
I want to add trigonometric instructions in my instrinfo.td files how can
i directly map these instructions in .td files. Please help me Guys.For
Sin, Cos, Tan and Cot Instructions.
If I used llvm.sin.* as SDNode Then it is error as llvm variable is not
defined SO please Help me.
Thanks and Regards
Varun
--------------...
2010 Jun 17
3
trigonometric regression
Suppose I do a trigonometric regression
fit<-lm(y~ cf + sf)
where cf and sf are the cos and sine components.
b<-coef(fit)
I have the fitted sine component b[2] and the cos component b[3].
Doing summary(fit) gives me the p-values and SEs for b[2] and b[3].
But I want the amplitude of the fitted waveform
amp<-sqrt(b...
2018 Jan 02
1
https://reviews.llvm.org/D41659 Needs review.
https://reviews.llvm.org/D41659
Implemented missing trigonometric optimization in llvm.
Here we have implemented the following missing trigonometric optimizations.
1. tan(x)*cos(x)=sin(x)
2. sin(x)*cos(x) = sin(2*x)/2
3. sin(x)/tan(x)=cos(x);
4. tan(x)/sin(x)=1/cos(x);
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2005 Jul 12
3
using its to import time series data with uneven dates
...9 18 30 373.60
<NA> 2000 3 14 18 30 373.34
<NA> 2000 3 23 18 0 373.01
I have tried every format option on the help page. How can I read in
my decimal dates (e.g., 2000.18790)?
Note that these data (CO2) are irregularly spaced in time (Time).
Ultimately I would like to fit a trigonometric polynomial (first
harmonic) to these data in order to smooth them and obtain values
between measurements. Any suggestions you can provide on how to do
this would be much appreciated.
Thank you for your help.
Sheri
Sheri L. Conner Gausepohl
Graduate Research Assistant
Department of Atmosphe...
2003 Jan 30
2
mgcv, gam
...nice igf gam would accept an na.action argument, but that not the
main point.
I want to have a smooth term for time over a year, the same pattern
repeating in succesive years. It would be natural then to impose
the condition s(0)=s(12). Is this possible within mgcv?
I tried to obtain this with trigonometric terms, aca:
> Rot.gam2 <- gam(cbind(Rotavirus,Total)~ s( I(sin((MesN/12)*2*pi)),
bs="cr" )+
+ s( I(cos((MesN/12)*2*pi)), bs="cr" ),
data=na.omit(Rot),
+ family=binomial)
Warning messages:
1: Termwise estimate degrees of freedom...
2005 Sep 26
1
Precomputing the remaining floating point operations.
I see there are still some floating point operations left in the codec
init(ialization) code. Changing that code to fixed point is not only
difficult (due to the trigonometric functions etc) but may also degrade the
precision.
Here is an idea whereby we can easily precompute (record) all those values
on a powerful processor and then use (replay) them on an embedded processor
/ DSP. The only requirement is that 'xxx_init_xxx' should be called in
exactly the...
2012 Apr 12
4
Simple Problem: Plotting mathematical functions
...en do not really understand how to plot just
one graph...
I found this code in the Internet, which plots a cos-function:
>x <- seq( -10, 10, length = 1000)
>plot(x, *sin(x)*, xlab="x-values", ylab="f(x)", type="l")
>lines(x, cos(x), lty=3)
>title( "Trigonometric functions", "sin(x) and cos(x)")
If I replace the sin(x) thing (bold) with one of my functions, it doesn't
work and reports an unwanted character.
Can somebody help me with that?
--
View this message in context: http://r.789695.n4.nabble.com/Simple-Problem-Plotting-mathemati...
2010 Jun 17
5
Optimization problem
...e is not the final percentage,
it can be 90%... or 50%. The service is ok with both numbers.
Although I've solved the problem calculating the slope and making an axis
change, I'd like to make something "statistically" stronger, because in the
end what I'm doing is making some trigonometrics.
If you think on other solutions i'd appreciate your help.
Thanks,
J. Lozano
Other examples:
Example 2:
----------
devices<-1:45
percentages<-c(19.6,38.3,53.2,65,72.9,78.5,82.8,87,89,90.1,91.7,92.6,93.7,94
.6,95.4,96,96.5,96.9,97.2,97.7,97.9,98.3,98.6,98.8,99,99.3,99.6,99.8,100,100...
2010 May 14
1
point.in.polygon() in sp package: accuracy problems?
...the limits of my diagram (by point.in.polygon).
The example below shows a simple example with one polygon with a right angle (easy to plot).
I suspect this is a problem of accuracy (as I already got similar problems with a code I made, that proved to be due to accuracy problems arising from from trigonometric calculations), but I would like to know if I am right or if this is another problem (maybe in my own code)... I must say that with 'real & uncertain soil data', I don't really care to know if a point is right on the border of a polygon, but it is good to know what cause the proble...
2006 Oct 05
4
glm with nesting
I just had a manuscript returned with the biggest problem being the
analysis. Instead of using principal components in a regression I've
been asked to analyze a few variables separately. So that's what I'm
doing.
I pulled a feather from young birds and we quantified certain aspects of
the color of those feathers. Since I often have more than one sample
from a nest, I thought I
2016 Jul 13
7
RFC: SIMD math-function library
...jointly propose to add my vectorized math
library to LLVM.
The library has been available as public domain software for years, I am
going to double-license the library if necessary.
********
Below is a proposal to add my vectorized math library, SLEEF [1], for
evaluating elementary functions (trigonometry, log, exp, etc.) to LLVM.
The library can be used directly, or can be targeted by an
autovectorization infrastructure. Patches to tie SLEEF into LLVM's
autovectorizer have been developed by Hal Finkel as part of the bgclang
project (which provides LLVM/Clang ported to the IBM BG/Q supercom...
2006 Dec 06
0
mFilter package
...ral time series filters useful for smoothing
and extracting trend and cyclical components of a time series. The
routines are commonly used in economics and finance, however they should
also be interest to other areas. Currently, Christiano-Fitzgerald,
Baxter-King, Hodrick-Prescott, Butterworth, and trigonometric regression
filters are included in the package.
Cheers,
--
Mehmet Balcilar, PhD
Associate Professor of Econometrics
Cukurova University
College of Economics & Administrative Sciences
Department of Econometrics
Balcali, Adana 01330
Turkey
Tel: +90 (322) 338-7255 (6 lines) Ext. 170...
2004 Feb 06
0
PractiCalc - A New CALCULATOR
...ed into your equations
- Menu selectable conversion functions that can be inserted into your equations
- Menu selectable user-defined formula that can be inserted into your equations
- Dynamic real-time updating of user-defined formula
- Save and restore user-defined named sets of formula
- Trigonometric functions can be defined as taking arguments in radians, degrees or gradients
- Equation history preservation and recall
- Skinable screens
- Optional translucent (ghost) screens for see-thru effect
- and many other features and calculatin aids....
---------------------------------------...
2008 Nov 17
2
How to calculate the linear distance between 2 points
Deemed colleagues
I would appreciate your help with a sentence to calculate the linear
distance between 2 geographical points (coordinates in UTM).
In advance thnks for your attention,
--
Ricardo Bandin Llanos
rbandin@udec.cl
Estudiante - Magíster Cs. m. Pesquerías
Universidad de Concepción, Región del Bio-Bio, Chile
Celular: (0056-41) 97949957
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2013 Apr 17
0
[LLVMdev] Request for compilers
Hi Ganesh,
Please have a look at:
These core parts of LLVM:
http://llvm.org/docs/doxygen/html/classllvm_1_1Loop.html#a72bbf45d2e00971f56bf8cfe4e1df01c
http://llvm.org/docs/Vectorizers.html
These research projects based on LLVM:
http://polly.llvm.org
http://aesop.ece.umd.edu
I'm not sure what you mean by "identify intrinsic functions". If you really
mean LLVM intrinsics,
2013 Apr 17
2
[LLVMdev] Request for compilers
Hi,
For one of our research projects, we are planning to use LLVM. We need the following features:
1. We need to aggressively fuse loops that have inter-loop dependencies.
2. We need to identify intrinsic functions and induction variables.
3. We need to detect few memory access patterns like copy, transpose-copy, stride-copy etc.
4. Lastly, auto-vectorization and
2010 Dec 20
2
Sine Regression in R
Hi everyone,
I am trying to fit a sine function on one year of wind data. I have two
questions below.
Looking around on the net I managed to get the following:
Sine Equation: y = a + b * sin( c + d*x )
b is the amplitude, c is the phase shift, d is something deal with
periodicty of data*.*
This can be linearised by sin( c+dx ) = cos(c) * sin(dx) + sin(c) *
cos(dx).
If one calls dx = x1
y
2011 Oct 06
0
Revolutions Blog: September Roundup
...jobs (http://bit.ly/r73Ijs), the fastest
method for boarding airplanes (http://bit.ly/pKqxGB), conversations
between chatbots (http://bit.ly/r29KRX), the strange images created by
photographing propellers with iPhones (http://bit.ly/ovCF4D), an
audible illusion (http://bit.ly/p0GR6X), and a visual trigonometric
pun (http://bit.ly/qQLbB4).
There are new R user groups (http://bit.ly/eC5YQe) in Tokyo, Shanghai,
Stamford, Medford and Barcelona: http://bit.ly/ovwoYb . Meeting times
for these groups can be found on the updated R Community Calendar at:
http://bit.ly/bb3naW
If you're looking for more arti...
2018 Nov 30
3
(Question regarding the) incomplete "builtins library" of "Compiler-RT"
...s://msdn.microsoft.com/en-us/library/mt703294.aspx>
* signed 64-bit integer operations: _alldiv(), _alldvrm(),
_allrem(), _allshl(), _allshr(), _allmul()?
See <https://msdn.microsoft.com/en-us/library/ms648425.aspx>
For the following I'm not sure whether LLVM/clang calls them:
* trigonometric and transcendental floating-point operations:
_CIacos(), _CIasin(), _CIatan(), _CIatan2(), _CIcos(),
_CIcosh(), _CIexp(), _CIfmod(), _CIlog(), _CIlog10(),
_CIpow(), _CIsin(), _CIsinh(), _CIsqrt(), _CItan(), _CItanh()?
See <https://msdn.microsoft.com/en-us/library/ff770582.aspx>,
&...
2006 May 17
3
Off topic --- help in locating a source.
Apologies for the off-topic question; as usual I'm trying to draw
upon the unparalleled knowledge and sagacity of the r-help list.
Please reply off-list if you can help me out.
A collaborator of mine found a formula we need, on sheets which he had
photocopied out of a book, some years ago. He cannot remember which
book (he's getting to be as senile and forgetful as I am, poor
bloke!).