本文转载自: http://yinjilong.blogbus.com/logs/509772.html 【thanks】 使用 gnuplot 4.0 将数据和函数转换为专业的图表,gnuplot 4.0 是一种免费分发的绘图工具。本文是 gnuplot 的实践指南,着重讲述了有效使用此工具的一些惯例。 gnuplot 是一种免费分发的绘图工具,可以移植到各种主流平台。它可以下列两种模式之一进行操作:当需要调整和修饰图表使其正常显示时,通过在 gnuplot 提示符中发出命令,可以在交互模式下操作该...
by yexin218 - 网络技术文档中心 - 2008-07-08 17:43:57 阅读(1690) 回复(0)
小弟利用gnuplot画图,必须使用multiplot命令,在网上看到好多资料,但为什么我总是不成功呢,我的意思就是在同一张图里同时画多个图,代码如下 set te png small color picsize 420 180 set multiplot set size 0.5,0.5 set origin 0.0,0.5 plot sin(x) set size 0.5,0.5 set origin 0.0,0.0 plot 1/sin(x) unset multiplot set output '1.png' replot 结果能出来,但不是2张图,谁能告诉我那错了
我以前在Sco Unix下用c/c++开发过一段时间的程序。已经有三年没有编程了。现在想再重新熟悉一下。 我现在用的是linux,有什么工具推荐用来开发c/c++吗?另外如果我想所学的东西能够以后移植到其他的UNIX比如solaris。有什么建议吗? 谢谢
谁有关于学习动态性能表V$sysstat对STATSPACK的信息收集的示例SQL,小弟急用!先谢谢了。 如: Logical reads: Block changes: Physical reads: Physical writes: User calls: Pars Hard parses: Sorts: Logons: Executes: T...
在linux下安装没问题,有freebsd的包吗?总是包错 bash-2.05# make config "build/CONFIG", line 18: Need an operator "build/CONFIG", line 20: Need an operator "Makefile", line 21: Need an operator "Makefile", line 23: Need an operator # Directories ifndef PREFIX 21行 PREFIX = /usr endif ifndef SA_LIB_DIR
#!/usr/bin/perl use strict; use FileHandle; use File::Temp qw/ tempfile tempdir /; my ($fh, $filename) = tempfile(DIR => './', UNLINK => 1); foreach my $x (-50 .. 50){ print $fh $x/5," ",sin($x/5),"\n"; } $fh->flush(); open PLOT,"| gnuplot -persist"; PLOT->autoflush(1); print PLOT << "gnuplot_Commands"; plot '$filename' with line pause 1 plot cos(x) gnuplot_Commands cl...
两组数据在下面, 想用第1列和第7列的平方根在对数坐标下做图。同时拟合这些数据,把直线画上去,不知道怎么弄。 我的代码如下, 得到错误的图。 index = 0 set log x set log y plot "temp" in index using 1:(sqrt($2)) r1(x) = a + b * x fit r1(x) "temp" in index using (log($1)):(log(sqrt($2))) via a, b replot r1(x) index = 1 replot "temp" in index using 1:(sqrt($2)) r2(x) = c + d * x fit r2(x) "temp" in inde...
CMS in PhP or Java Users are able to rate institutions and write reviews, also able to upload pictures and videos on our site Please PM me Thanks
Python is a programming language which has come a long way in a relatively short time. My main interest is the interface to the PostgreSQL database. I use Perl as part of several websites (including this one, FreshPorts and FreshSource ). I am now investigating Python to see how I can use it in similar areas. Installing Python As always, I am using the ports tree to install. cd /usr/p...