r - Explanation for sprintf("%03d", 7) functionality? -


i trying write functions in r aim read multiple .csv files. named 001.csv, 002.csv, ... 332.csv.

with paste managed construct names 1.csv, 2.csv , on, i'm having difficulty adding leading zeroes. there's hint construction sprintf("%03d", 7) required, have no idea why , how works.

so can explain following statement can does?

sprintf comes c , formatting rules taken well. see ?sprintf in r or this or this reference learn subject in detail. here i'll briefly outline what's magic behind it.

"%03d" formatting string, specifies how 7 printed.

  • d stands decimal integer (not double!), says there no floating point or that, regular integer.
  • 3 shows how many digits printed number have. more precisely, number take at least 3 digits: 7 __7 (with spaces instead of underscores), 1000 remain 1000, there no way write number 3 digits.
  • 0 before 3 shows leading spaces should replaced zeroes. try experimenting sprintf("%+3d", 7), sprintf("%-3d", 7) see other possible modifiers (they called flags).

-

Comments

Post a Comment

Popular posts from this blog

android - Automated my builds -

i have multiple app , android project want automated in build , release sequence. have ant script build , create apk of app. want have 1 script or ant file start build sequence app. maybe don't konw search, can't find easy documentation on ant. the point of use jenkins ant (or maven, i'm not sure of difference between them now) automated build sequence when people commit on project. any int appreciated maven dependencies (over ant) don't need pass around jars. recommend maven on ant day. syntax , overall process easier understand, @ end of both build tools. if able to, more recommend upgrading gradle. easy create different build types , create them ./gradlew assemble here project jake wharton can see power of gradle. there release , debug build, can make lot more if like. https://github.com/jakewharton/u2020 here android docs gradle http://tools.android.com/tech-docs/new-build-system/user-guide . if can't find looking here, check out main grad...
Read more

how to proxy from https to http with lighttpd -

i have internal site (192.168.2.1) accessible http on different server run public web-server using lighttpd. can make internal site accessible outside work follows $http["host"] == "internal.example.com" { ... proxy.server = ( "" => ( "internal" => ( "host" => "192.168.2.1", "port" => 8000 ) ) } this works, use https outside world. question is, how can proxy going https http ? i've tried this: $server["socket"] == ":443" { $http["host"] == "internal.example.com" { ... proxy.server = ( "" => ( "internal" => ( "host" => "http://192.168.2.1", "port" => 8000 ) ) } } but doesn't seem wor...
Read more

javascript - jQuery get link id -

i'm trying id-attribute of dynamic generated table. if click on first link want "editemploee-4". <table id="example" class="table span12 table-bordered table-hover"> <thead> <tr> <th>firstname</th> <th>lastname</th> <th>edit</th> </tr> </thead> <tbody> <tr> <td>person 1</td> <td>name person 1</td> <td><a href="#" class = "editdialog" id="editemployee-4"><img src="img/edit.png" height="20" /></a></td> </tr> <tr> <td>person 2</td> <td>name person 2</td> <td><a href="#" class = "editdialog" id="editemployee-5"><img src="img/edit.png" height="20" />...
Read more