zero

问题 I have the code below and I would like to convert all zero's in the data to None 's (as I do not want to plot the data here in matplotlib). However, the code is notworking and 0. is still being printed sd_rel_track_sum=np.sum(sd_rel_track, axis=1) for i in sd_rel_track_sum: print i if i==0: i=None return sd_rel_track_sum Can anyone think of a solution to this. Or just an answer for how I can transfer all 0 to None . Or just not plot the zero values in Matplotlib. 回答1: values = [3, 5, 0, 3, 5,

问题 I've got a double that prints as 0.000000 and I'm trying to compare it to 0.0f , unsuccessfully. Why is there a difference here? What's the most reliable way to determine if your double is zero? 回答1: To determine whether it's close enough to zero that it will print as 0.000000 to six decimal places, something like: fabs(d) < 0.0000005 Dealing with small inaccuracies in floating-point calculations can get quite complicated in general, though. If you want a better idea what value you've got,

问题 I have a problem to solve how to remove rows with a Zero value in R. In others hand, I can use na.omit() to delete all the NA values or use complete.cases() to delete rows that contains NA values. Is there anyone know how to remove rows with a Zero Values in R? For example : Before | DateTime | Mac1 | Mac2 | Mac3 | Mac4 | ---------------------------------------------------- | 2011-04-02 06:00 | 20 | 0 | 20 | 20 | | 2011-04-02 06:05 | 21 | 21 | 21 | 21 | | 2011-04-02 06:10 | 22 | 22 | 22 | 22

问题 class test{ public static void main(String args[]){ int a = 011; System.out.println(a); } } Why I am getting 9 as output instead of 011 ? How can I get 011 as output? 回答1: The JLS 3.10.1 describes 4 ways to define integers. An integer literal may be expressed in decimal (base 10), hexadecimal (base 16), octal (base 8), or binary (base 2). An octal numeral consists of a digit 0 followed by one or more of the digits 0 through 7 ... A decimal numeral is either the single digit 0, representing

问题 I am coding in python and I cannot seem to figure out why when the amount of tickets sold is entered it does not calculate the full price of the tickets that were sold. Any help is appreciated, Thanks. aLimit=300 bLimit=500 cLimit=100 aPrice=20 bPrice=15 cPrice=10 ticketSold=1 totalIncome=0 def Main(): getTickets(aLimit) sectionIncome=calcIncome(ticketSold,aPrice) sectionIncome+=totalIncome print("The theater generated this much money from section A "+ str(sectionIncome)) getTickets(bLimit)

问题 i'm working on a script in perl. This script read a DB and generate config file for other devices. I have a problem with "0". From my database, i get a 0 (int) and i want this 0 become a "0" in the config file. When i get any other value (1,2,3, etc), the script generate ("1","2","3", etc). But the 0 become an empty string "". I know, for perl: - undef - 0 - "" - "0" are false. How can i convert a 0 to "0" ? I try qw,qq,sprintf, $x = $x || 0, and many many more solutions. I juste want to make

问题 Background I'm working on a Bukkit Plugin (Minecraft Server-side). The plugin allows for players to send messages back and forth to each other. I am working on a web interface as well. In order to view their 'inbox' they must first login from a password the can set in-game. This password isn't stored raw, it is converted into a long string of unicode values, then broken up into pieces, each converted to hex and appended to a different string. Java version //This isn't the best method, I know,

问题 My Cheque generator program has worked flawlessly for any input you give it to make it output the numerals in words. for example if I were to input "1234.56" it will out put "One Thousand Two Hundred Thirty Four Dollars and ... 56 Cents". However whenever I want to output something like "1000" it will output "One Thousand Zero Dollars and ... 0 Cents". Obviously its not 1000 Zero dollars, The cents are perfectly fine, however I wish to get rid of that "Zero" but I need that in there for

问题 Basically I need to write a program that takes user input up to and including 2^31 -1 in the form of an integer and returns the amount of odd, even, and zero numbers in the int. For example, Input: 100 Output: 1 Odd, 0 Even, 2 Zeros // 1(Odd)0(Zero)0(Zero) or Input: 2034 Output: 1 Odd, 2 Even, 1 Zero // 2(Even)0(Zero)3(Odd)4(Even) I'm pretty sure I'm over thinking it but I can't slow my brain down. Can anyone help? This is the third iteration of the code, the first two were attempted with for

问题 I want to turn a "dirty" figure into a properly written currency price. The input figure will be something like 23.99000 and I want to display 23,99 + the Euro symbol. I use this: $price = number_format($price, 2, ',', '')." €"; But the result will be 23,00 € instead of 23,99 €. What am I getting wrong? Thanks! 回答1: Try something like this: <?php $price = 23.99000; $price = sprintf("%01,2f", $price).' €'; echo $price; Output: 23,99 € the f means it'll treat the string as a float, and format