apply族函数是R语言中很有特色的一类函数，包括了apply、sapply、lapply、tapply、aggregate等等。在这篇博文里对它们进行了简略的说明。这一类函数本质上是将数据进行分割、计算和整合。它们在
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一个简单的狼兔追逐问题
四月八日，也就是春分月圆之后的首个星期日即是复活节(Easter)。而复活节兔是复活节象征之一。作为多产动物的兔子，象征了春天的复苏和新生命的诞生。此外，兔子是爱神阿弗洛狄特的宠
什么样的人能逃离泰坦尼克号？
1912年4月15日，英国皇家邮轮泰坦尼克号（RMS Titanic）在北大西洋撞上冰山沉没，1500多名乘客遇难，成为和平时期死亡人数最多的海难之一。这个沉船故事不断地为作家、电影制作人和歌曲作
Understanding Products Of Article Building
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Losing 10 Pounds – What’s Needed
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An Analysis Of Rudimentary Aspects For Stress Treatments
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Painless Advice In Quitting Smoking Benefits In The UK
Don’t let yourself get fooled into believing that it is just too hard to quit smoking. Many people finally give up and decide that there is just no hope...
Methods For Mobile Marketing Tutorials – A Background
Imagine that you own a shop that has quite a few regular customers, but you discover that one random day you have had little to no business come your way. You sen...