divide

问题 I have a dataset with 9558 rows from three different projects. I want to randomly split this dataset in three equal groups and assign a unique ID for each group, so that Project1_Project_2_Project3 becomes Project1 , Project2 and Project3 . I have tried many things, and googled codes from people with similar problem as I have. I have used sample_n() and sample_frac() , but unfortunately I can't solve this issue myself :/ I have made an example of my dataset looking like this: ProjectName <- c

问题 I'm trying to divide each number within a data frame with 16 columns by a specific number for each column. The numbers are stored as a data frame with 1-16 corresponding to the samples in the larger data frames columns 1-16. There is a single number per column that I need to divide by each number in the larger spreadsheet and print the output to a final spreadsheet. Here's and example of what I'm starting with. The spreadsheet to be divided. X131.478.1 X131.478.2 X131.NSC.1 X131.NSC.2 X166

问题 How would you divide a number by 3 without using * , / , + , - , % , operators? The number may be signed or unsigned. 回答1: This is a simple function which performs the desired operation. But it requires the + operator, so all you have left to do is to add the values with bit-operators: // replaces the + operator int add(int x, int y) { while (x) { int t = (x & y) << 1; y ^= x; x = t; } return y; } int divideby3(int num) { int sum = 0; while (num > 3) { sum = add(num >> 2, sum); num = add(num

问题 So what i need is basically described in the subject. Like if i would put in number 12 and amount of parts it should devide into, i would like it to return something like (with 4 parts) 8, 2, 1, 1. But not doubles because i need the values as int. I had found one answer earlier but it only worked using doubles. not ints. (this is the one i found) public double[] divideUniformlyRandomly(double number, int part) { double uniformRandoms[] = new double[part]; Random random = new Random(); double

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I have looked all over the internet for a simple-to-understand evaluation of how to multiply and divide in masm32 assembly. My questions are: Where should I place the numbers being multiplied? Where should I place the numbers being divided? Where does the remainder go in the

问题 I'm working on a micro-controller without hardware multiply and divide. I need to cook up software algorithms for these basic operations that are a nice balance of compact size and efficiency. My C compiler port will employ these algos, not the the C developers themselves. My google-fu is so far turning up mostly noise on this topic. Can anyone point me to something informative? I can use add/sub and shift instructions. Table lookup based algos might also work for me, but I'm a bit worried

问题 I'm trying to divide 2 integer and get the float results but it does not seem it is working properly. Can you see where am i doing wrong? sscanf part is working, the problem is at the dividing part. char *latitude = "4055,1792.N"; int val1; int val2; int val3; float result; sscanf ( latitude, "%2d%2d,%4d", &val1, &val2, &val3); printf("\r\nval1 = %d val2 = %d val3 = %d\r\n",val1,val2,val3); result = val1 + (float)val2/(float)60 + (float)val3/(float)600000; printf("\r\nResult = %f\r\n",result)

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I try to figure out how to handle my array to do "some math" with its values. The array looks similar to this: Array ( [0] => Array ( [person1] => 71 [person2] => 49 [person3] => 15 ) [1] => Array ( [person1] => 56 [person3] => 43 [person4] => 21 [person5] => 9 [person6] => 7 ) ..

问题 I have a data.frame gtable that has 61 columns. A total of 55 of the 61 columns [7:61] are sample names that match the row.name samples in my data.frame stats . There is another row.name mapped.reads.num in stats that has corresponding values for the samples . I need divide columns [7:61] in my gtable data.frame by the values of the row.name mapped.reads.num and output a new data.frame with same columns as in gtable and the new values. The code I am trying is: > test <- data.frame(gtable[7:61

问题 I am actually working on an image gallery which contains thumbnails of some videos I made. For this, I calculate the with of the gallery through the following code. $(function() { $(window).resize(function() { var width = $(this).width() - 200; $("#gallery").css("width", width); }).resize();}); Now each image should have an 16:9 aspect ratio. Therefore, I have to divide the width of the gallery width 16 and multiply this value with 9. Doesn't seem to be that hard but actually I am stuck.