Categories
Ask Mathematics

Bound the value of function by integration of derivatives

Given $f(x,y) \in C^2([0,1]^2)$ (by which I mean $C^2$ in some open neighborhood), with $f_x, f_y, f_{xy} \in L^1([0,1]^2, dxdy)$ (which is sure case since they are continuous), does the following hold? $$ \sup |f| \le \iint |f|+|f_x|+|f_y|+|f_{xy}|\, dxdy $$ I think it is safe to discretise this function under the assumptions, divide $f$ into […]

Categories
Mastering Development

Ressons for causing the list comphrension returns None? [duplicate]

def column_sums(square): “””takes such a (possibly magic) square as a parameter and returns a list of the column sums””” for column in range(len(square)): sums = [sum(row[column] for row in square)] # returns None while debugging result = sums.append(sums) return result ascending_square = [ [1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], […]

Categories
Mastering Development

how to summarise multiple logistic regression models in a table?

I have a dataset with age as continuous and as a factor, sex as a factor and 4 groups. logistic_s <- data.frame( ID = c(1:6), Age = c(9, 12, 16, 57, 29, 24), Age1 = factor(c(1, 2, 2, 6, 3, 3)), Sex = factor(c(“F”, “M”, “F”, “M”, “F”, “F”)), N = c(rep(1, 6)), G = […]

Categories
Mastering Development

How To Make this table

I wish i can make this table Table that’s my array $column1=array(1,9,17,25,33,41,49,57); $column2=array(2,10,18,26,34,42,50,58); $column3=array(3,11,19,27,35,43,51,59); $column4=array(4,12,20,28,36,44,52,60); $column5=array(5,13,21,29,37,45,53,61); $column6=array(6,14,22,30,38,46,54,62); $column7=array(7,15,23,31,39,47,55,63); $column8=array(8,16,24,32,40,48,56,64); $totalArray=count($column1);

Categories
Mastering Development

How do I use the cv2.imread function to read multiple images to display bounding boxes over them without having to include the path

How do I use the cv2.imread function to read multiple images to display bounding boxes over them without having to include the path? images = [ (“images/audrey.jpg”, np.array([ (12, 84, 140, 212), (24, 84, 152, 212), (36, 84, 164, 212), (12, 96, 140, 224), (24, 96, 152, 224), (24, 108, 152, 236)])), (“images/bksomels.jpg”, np.array([ (114, […]

Categories
Mastering Development

Probability of an element in list

My data List = [[[12,1,6],[12,1,6],15],[[12,2,6],[12,2,6],18]],[[12,3,6],[12,3,6],24]] I have a data containing number of rows having a transition from 12,1,6 to 12,1,6 is 15 number of rows having a transition from 12,2,6 to 12,2,6 is 18 number of rows having a transition from 12,3,6 to 12,3,6 is 24 as list This data is not generated.There are many […]

Categories
Ask Mathematics

Is there a triangle array that takes the preceding number and adds one for the first and subtracts one for the second term?

I was wondering if there is a triangle array that would produce 0 1,-1 2,0,0,-2 3,1,1,-1,1,-1,-1,3 4,2,2,0,2,0,0,-2,2,0,0,-2,0,-2,-2,4 where i becomes i+1, i-1 I’m looking for a way to determine if @ row x and position y the value is 0.

Categories
Mastering Development

Is there a way to create new columns in R based on manipulations from multiple data frames?

Does anyone know if it is possible to use a variable in one dataframe (in my case the “deploy” dataframe) to create a variable in another dataframe? For example, I have two dataframes: df1: deploy <- data.frame(ID = c(“20180101_HH1_1_1”, “20180101_HH1_1_2”, “20180101_HH1_1_3”), Site_Depth = c(42, 93, 40), Num_Depth_Bins_Required = c(5, 100, 4), Percent_Column_in_each_bin = c(20, 10, […]

Categories
Mastering Development

Add multiple arrays in Python

What I have created so far I have created an 18×18 square matrix of zeros called ‘master_matrix’. I have created an array called ingreso_datos, whose column 0 [col 0] indicates the data label. I have created a for loop where: For each data label I will have a little_matrix whose values will be assigned to […]

Categories
Mastering Development

python pulp: How do I create LpMaximize and LpMinimize problem?

How do I go about creating an optimization that LpMaximize profits and LpMinimize the variance? I tried making var negative than using LpMaximize. The code below just the max of var and not the min of var and the max of profit. prob += lpSum([profits[i]*x[i] for i in N] and [var[v]*x[v] for v in N]) […]