Hope someone can help me here, cause I've tried everything recommended in other threads online.
I am running octave on Ubuntu, and trying to use the xlsread command.
More specifically I am running the following
[num, txt]=xlsread('GLD');
And I am getting this error:
warning: xlsopen.m: no support for spreadsheet I/O
num = [](0x0)
txt = [](0x0)
warning: xlsread: some elements in list of return values are undefined
Packages loaded are:
io
java
Please help!
According to the wiki, you need to either:
Use Windows and have Excel installed, or
Use the Apache POI library through the java package.
For the latter option (adjust to current POI version):
> pkg load java
> javaaddpath('~/poi_library/poi-3.8-20120326.jar');
> javaaddpath('~/poi_library/poi-ooxml-3.8-20120326.jar');
> javaaddpath('~/poi_library/poi-ooxml-schemas-3.8-20120326.jar');
> javaaddpath('~/poi_library/xmlbeans-2.3.0.jar');
> javaaddpath('~/poi_library/dom4j-1.6.1.jar');
>
> pkg load io
> chk_spreadsheet_support
ans = 6
> javaclasspath
STATIC JAVA PATH
- empty -
DYNAMIC JAVA PATH
/home/markus/poi_library/poi-3.8-20120326.jar
/home/markus/poi_library/poi-ooxml-3.8-20120326.jar
/home/markus/poi_library/poi-ooxml-schemas-3.8-20120326.jar
/home/markus/poi_library/xmlbeans-2.3.0.jar
/home/markus/poi_library/dom4j-1.6.1.jar
Related
I'm trying to get this to work
http://fsharp.github.io/FSharp.Data/library/CsvFile.html
But to me it seems like tha CsvFile class and the CSVextionson are removed of the Data lib
I'm running it on Manjaro (Arclinux system)
I'm using the mono compiler (fsharpc)
I got the dotnet core lib
So nothing should be wrong
please help
EDITED
Code
open FSharp.Data
let msft = CsvFile.Load("https://github.com/kam1986/Data-Science-project/blob/master/news_sample.csv")
It is placed in a .fsx file
get hte error message
Fake News.fsx(3,14): error FS0039: The value, namespace, type or module 'CsvFile' is not defined.
I build a simple weka application using Weka 3.7.13 dev version using MAVEN. I have initialise the pom.xml function to get weka library from the repository.
i want to run a simple clustering algorithm using weka, and connecting it to MySQL database. As per documentation, the weka need to have a DatabaseUtil.props file which contains it's jdbc driver. I have setup that.
This is my project structure:
I can retrieve the DatabaseUtils.props using my code below. But somehow the weka itself cannot recognise the jdbc:Url and driver name which i already configure inside.
DatabaseUtil.props file:
# JDBC driver (comma-separated list)
jdbcDriver=com.mysql.jdbc.Driver
# database URL
jdbcURL=jdbc:mysql://127.0.0.1:3306/datamining
Java code which i trigger the Weka module:
public void dm(){
int cluster = 4;
InstanceQuery clusterQuery = null;
try{
//file reader of database utilities properties
ClassLoader classLoader = getClass().getClassLoader();
File fileProps = new File(classLoader.getResource("DatabaseUtils.props").getFile());
//setup the data preparation functionality then connect to database
clusterQuery = new InstanceQuery();
clusterQuery.setUsername("test");
clusterQuery.setPassword("test");
clusterQuery.setQuery("SELECT * FROM TEMP_KMEANS");
clusterQuery.setCustomPropsFile(fileProps);
But when executed the function returning error: java.sql.SQLException: No suitable driver found for jdbc:idb=experiments.prp
It seems that the DatabaseUtils.props file cannot override the default driver value jdbc:idb=experiments.prp
Any ideas why this is throwing?
Any feedback and answer much appreciated.
I created a DatabaseUtils.props file in the src / main / resources folder and wrote the following code. It worked for me, I'm using weka 3.8.0.
File file = new File(getClass().getClassLoader().getResource("DatabaseUtils.props").toURI());
InstanceQuery query = new InstanceQuery();
query.setCustomPropsFile(file);
query.setUsername(MYSQL_USER);
query.setPassword(MYSQL_PASSWORD);
query.setQuery("select * from Action");
instances = query.retrieveInstances();
System.out.println(instances.toString());
The documentation says "These may be changed by creating a java properties file called DatabaseUtils.props in user.home or the current directory". Your properties file does not match those requirements (a properties file in a jar is not on the filesystem). See also Chapter 14 of the Weka manual.
An alternative solution is to set the URL in code using setDatabaseURL. As long as the JDBC driver is on the classpath this should work.
Environment Details
Mac OS X 10.9
Oracle JDK 1.7.0_55 64-bit
jython-standalone-2.5.3.jar
junit-4.11
What I have done so far
I have added the junit jar to /Library/Java/Extensions.
I invoked Jython as follows java -jar jython-standalone-2.5.3.jar
In the Jython interpreter, I imported the following import org.junit.Assert, and this import was successful.
Problem
When I tried to use assertTrue, I got a NameError in the interpreter. Why is this so?
I understand that assertTrue is a static method. Not sure what implication this has when I try to use it in Jython.
Additional Context
I am using XMLUnit in Jython. Was able to successfully import the Diff class from org.custommonkey.xmlunit in Jython. Also able to use the methods in this class, and call them on a Diff object. The result of this method call is what I am trying to pass to assertTrue, when it throws the error.
from org.custommonkey.xmlunit import Diff
import org.junit.Assert
xml1 = ...some XML string...
xml2 = ...some XML string...
myDiff = Diff(xml1, xml2)
assertTrue(myDiff.similar())
Hope this additional information is useful in identifying a solution to this problem.
Latest Status
I narrowed it down to setting this property python.security.respectJavaAccessibility = false, since the Assert() constructor is protected.
Still trying to get it to work. Any help is greatly appreciated.
Figured it out.
In addition to junit.jar file, the hamcrest-core.jar file also needed to be copied to /Library/Java/Extensions.
Then I got rid of the jython.jar file, and instead installed it using the jython installer.
After the installation was completed, I updated the registry file in the installation folder, specifically setting this property python.security.respectJavaAccessibility = false.
Now I am able to see the assertTrue method, and no longer getting a NameError.
I am trying to use multicore-0.2.15 toolbox with Octave v3.6.4 on Windows7 64bit
( http://octave.sourceforge.net/multicore/ )
but even the demo script doesn't seem to work, it's not possible to create a pipe and I received an error message. So if I try to evaluate the following command in Octave
[read_fd, write_fd, err, msg] = pipe ()
I receive the following output:
read_fd = -1
write_fd = -1
err = -1
msg = pipe: not supported on this system
The fork function doesn't work either.
Does anyone have an idea what the problem might be?
Zoltan
The error message pipe: not supported on this system says it all. There is no support for pipe() in your system (Windows 7). You can:
Not use the multicore which you will notice is unmaintained (see the unmaintained section at the bottom of the package list). You could instead use the parallel package.
Try another build of Octave. Maybe the MinGW builds will work with pipes.
Try another version of Octave. Version 3.8.1 has already been released and if it is a problem on the side of Octave instead of Windows, maybe it has been fixed.
Change operating system (pipe() works fine in Debian)
I am trying to use the Ocaml csv library. I downloaded csv-1.2.3 and followed the installation instructions after installing findlib:
Uncompress the source archive and go to the root of the package,
Run 'ocaml setup.ml -configure',
Run 'ocaml setup.ml -build',
Run 'ocaml setup.ml -install'
Now I have META, csv.a, csv.cma, csv.cmi, csv.cmx, csv.cmxa, csv.mli files in ~/opt/lib/ocaml/site-lib/csv repertory. The shell command ocamlfind list -describe gives csv A pure OCaml library to read and write CSV files. (version: 1.2.3) which I believe means that csv is installed properly.
BUT when I add
let data = Csv.load "foo.csv" in
in my compute.ml module and try to compile it within the larger program package I have the compilation error :
File "_none_", line 1, characters 0-1:
Error: No implementations provided for the following modules:
Csv referenced from compute.cmx"
and if I simply type
let data = load "foo.csv" in
i get :
File "compute.ml", line 74, characters 13-17:
Error: Unbound value load
I have the same type of errors when I use Csv.load or load directly in the Ocaml terminal. Would somebody have an idea of what is wrong in my code or library installation?
My guess is that you're using ocamlfind for compilation (ocamlfind ocamlc -package csv ...), because you have a linking error, not a type-checking one (which would be the case if you had not specified at all where csv is). The solution may be, in this case, to add a -linkall option to the final compilation line producing an executable, to ask it to link csv.cmx with it. Otherwise, please try to use ocamlfind and yes, tell us what your compilation command is.
For the toplevel, it is very easy to use ocamlfind from it. Watch this toplevel interaction:
% ocaml
Objective Caml version 3.12.1
# #use "topfind";;
- : unit = ()
Findlib has been successfully loaded. Additional directives:
#require "package";; to load a package
#list;; to list the available packages
#camlp4o;; to load camlp4 (standard syntax)
#camlp4r;; to load camlp4 (revised syntax)
#predicates "p,q,...";; to set these predicates
Topfind.reset();; to force that packages will be reloaded
#thread;; to enable threads
- : unit = ()
# #require "csv";;
/usr/lib/ocaml/csv: added to search path
/usr/lib/ocaml/csv/csv.cma: loaded
# Csv.load;;
- : ?separator:char -> ?excel_tricks:bool -> string -> Csv.t = <fun>
To be explicit. What I typed once in the toplevel was:
#use "topfind";;
#require "csv";;
Csv.load;; (* or anything else that uses Csv *)