我正在尝试安装ImageMagick和RMagic,因为它们在OS X Lion升级后无法运行.当我跑
brew install imagemagick
我收到了错误
Error: You must `brew link libpng' before imagemagick can be installed
但是当我brew link libpng按照错误消息中提到的那样运行时,我会得到:
Error: You must `brew link libpng' before imagemagick can be installed
Radek-Macs-MacBook-Pro-3:sharelock-staging radek$ brew link libpng
Linking /usr/local/Cellar/libpng/1.5.13... Warning: Could not link libpng. Unlinking...
Error: Could not symlink file: /usr/local/Cellar/libpng/1.5.13/include/pnglibconf.h
/usr/local/include/pnglibconf.h may already exist.
/usr/local/include may not be writable.
如何解决这个问题？我两天没有成功地解决了RMagic的事情......这是一场纯粹的噩梦......
-- Build of crashreporter disabled.
-- Found Qt5 core, checking for further dependencies...
-- Using Qt 5!
-- GIT_SHA1 40cdbda31285d9090d8109b10b244aa4740a5891
-- Using Qt 5.4.x
-- We would not require Neon in this setup, compile without!
CMake Error at /usr/local/Cellar/cmake/3.1.3/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:138 (message):
Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
system variable OPENSSL_ROOT_DIR: Found unsuitable version "0.9.8zc", but
required is at least "1.0.0" (found
/usr/lib/libssl.dylib;/usr/lib/libcrypto.dylib)
Call Stack (most recent call first):
/usr/local/Cellar/cmake/3.1.3/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:372 (_FPHSA_FAILURE_MESSAGE)
/usr/local/Cellar/cmake/3.1.3/share/cmake/Modules/FindOpenSSL.cmake:318 (find_package_handle_standard_args) …这是考试问题之一,目标是确定该课程的内容.我真的很困惑int (*f[])(int*) = {f1, f2, f2, f1 };.我教过它可能是一个数组,其元素是括号中函数的结果,这些结果是指向int的地址.
你能解释一下吗？
而且,该函数f[i++]进入的参数是什么
for (i=0; i<2; a += fx(f[i++], a));
问题:
int f2(int *p) { return *p-- + 2; }
int f1(int *q) { return ++*q; }
int fx(int (*pf)(int*), int q) {
int t = q;
while ((t = pf(&q)) % 2) q+=2;
return t;
}
#include <stdio.h>
void main() {
int a = 4, b = 3, *p = &b, i;
int (*f[])(int*) = {f1, f2, f2, …html_theme = 'alabaster'使用Sphinx1.3.1 时是否有一种简单的方法来增加换行宽度？
alabaster 现在是默认主题,看起来很棒,除了它非常紧密地包裹线条,我希望能够配置它.
TensorFlow.conv2d()对于将大图像与大内核（滤波器）进行卷积来说，速度慢得不切实际。将 1024x1024 图像与相同大小的内核进行卷积需要几分钟。为了进行比较，cv2.filter2D()立即返回结果。
我发现tf.fft2()和tf.rfft()。
然而，我不清楚如何使用这些函数执行简单的图像过滤。
如何使用 FFT 通过 TensorFlow 实现快速 2D 图像过滤？
我试过安装
python setup.py install进入提取的焦油球目录)pipeasy_install但似乎什么都没有用......我已经下载并升级了xcode,安装了命令行工具..我克隆了pandas的github存储库
cd ../pandas
python setup.py install
running install
running bdist_egg
running egg_info
writing requirements to pandas.egg-info/requires.txt
writing pandas.egg-info/PKG-INFO
writing top-level names to pandas.egg-info/top_level.txt
writing dependency_links to pandas.egg-info/dependency_links.txt
reading manifest file 'pandas.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching 'setupegg.py'
no previously-included directories found matching 'doc/build'
warning: no previously-included files matching '*.so' found anywhere in distribution
warning: no previously-included files matching '*.pyd' found anywhere in distribution
warning: no …我的问题是如何使用MATLAB搜索文件夹中的某种类型的文件.我举一个例子详细说明我的问题:
假设我们有以下文件夹及其中的文件:
My_folder
Sub_folder1
Sub_sub_folder1
a.txt
1.txt
2.txt
Sub_folder2
3.txt
abc.txt
在这个例子中,我想找到所有.txt文件My_folder及其子文件夹.我想知道我能用MATLAB做些什么.谢谢!
我需要将字符串中所有出现的 \xc3\x91 替换为 N 。
\n\n到目前为止我这样做了：
\n\nHOLA="HOLA\xc3\x91\xc3\x91\xc3\x91A" \necho $HOLA|sed -r \'s/\xc3\x91/N/g\'\n但我得到的HOLAN不是HOLANNNA.
我究竟做错了什么？
\n如何将焦点放在Windows 10 UWP应用程序中的网格上？好像它没有焦点成员.
我的UI上有多个按钮，我想根据不同的点击类型执行不同的功能，
对于我来说，只需轻按一下即可完成操作，这是一个IBAction，所有四个按钮均已连接到IBAction，但对于其他类型的点击，我却无法控制
我了解我需要使用点击手势识别器，但是无法将其设置为多个UIButton，
这是我想做的事的例子
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var Label: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func ButtonSingleTap(sender:UIButton!) {
let ButtonNumber: String = String(sender.tag)
Label.text = "Button " + ButtonNumber + " is Single Tapped"
}
func ButtonDoubleTap(sender:UIButton!) {
let ButtonNumber: String = String(sender.tag) …uibutton uitapgesturerecognizer uilongpressgesturerecogni xcode7 swift2