Selecting lines having same values for first two columns
Hello to all.
This is first post. Kindly excuse me if I do not adhere to any rules and regulations of this forum.
I have a file containing some rows with three columns each per row(separeted by a space). There are certain rows for which first two columns have same value but the value in third column is different. In that case I wish to retain only that row which has the maximum value for third column. Further I want to wirte the rows not required to a file for further processing.
I have a question
I have like 19 different list which contains the name of the server but what I need is just unique ones.
First thing I need to do is just make a unique list within the list itself
i.e. delete anything that is repeated inside the list
like for example
in list1
i... (1 Reply)
Hello experts,
I am new to this group and to 'SED' and 'AWK'. I have data (text file) with 5 columns (C_1-5) and 100s of lines (only 10 lines are shown below as an example). I have to find or select only the id numbers (C-1) of specific lines with '90' in the same line (of C_3) AND with '20' in... (6 Replies)
Hi
My pipe delimited .txt file contains rows with 10 columns.
Can anyone advise how I output to file only those rows with the letters ‘ci'
as the first 2 characters in the 3rd column ?
Many thanks (4 Replies)
In a table, date is stored in a column as "2011-01-4".
If I write query to get the dates > "2011-01-06" , then the date "2011-01-4" is also listed. The date stored in the column is a varchar datatype. So how can I make a query to not display the date "2011-01-4" ? Is there any solution ? Thank... (4 Replies)
I have two arrays DIST(1:NCOF) and X(1:NX)
Let NCOF = 5 and NX = 15, with
DIST = and
X =
I want to create an array that puts a zero if DIST is outside the region in X, otherwise putting 1.
In this example I should get
RES =
Using DIST = would give RES =
The values in... (6 Replies)
Hi, all:
I am not familiar with unix,and just started awk scripts. I want to retrieve lines that have the first 4 columns with different values. For example, the input is like this (tab delimited file with one header)
r1 A A A A x
r2 A B B A x
r3 B B B B x
the output should be (header is... (15 Replies)
Hi Guys !
i want to search a record in file by matching two values in a record in two different columns
suppose i have 3 columns
and i want to select all those values from col1 for which in col3 has a specific value
e.g select all "john" from column1 where column 3 has a value of "20"
... (9 Replies)
Hi,
I have a file with the following columns:
361459 447394 CHL1
290282 290282 CHL1
361459 447394 CHL1
361459 447394 CHL1
178352861 178363529 AGA
178352861 178363529 AGA
178363657 178363657 AGA
Essentially, using CHL1 as an example. For any line that has CHL1 in... (2 Replies)
Hello, everyone
I am beginner for shell programming. I want to print all lines that have the same values in first two columns
data:
a b 1 2
a a 3 4
b b 5 6
a b 4 6
what I expected is :
a a 3 4
b b 5 6
but I searched for one hour in... (2 Replies)
Hi, everyone
I have a dataset like this:
A B C D
A C
C D E
F G H
F D K
Y
X A
K K C Gsome of columns have no values in each line. I want to print all lines that have 1/2/3/4 values, export separately to four files. What I expected is like this:
file1
Y
file 2
A C
X Afile 3... (3 Replies)
Discussion started by: nengcheng
3 Replies
LEARN ABOUT MOJAVE
mpsmatrixdescriptor
MPSMatrixDescriptor(3) MetalPerformanceShaders.framework MPSMatrixDescriptor(3)NAME
MPSMatrixDescriptor
SYNOPSIS
#import <MPSMatrixTypes.h>
Inherits NSObject.
Class Methods
(__nonnull instancetype) + matrixDescriptorWithDimensions:columns:rowBytes:dataType:
(__nonnull instancetype) + matrixDescriptorWithRows:columns:rowBytes:dataType:
(__nonnull instancetype) + matrixDescriptorWithRows:columns:matrices:rowBytes:matrixBytes:dataType:
(size_t) + rowBytesFromColumns:dataType:
(size_t) + rowBytesForColumns:dataType:
Properties
NSUInteger rows
NSUInteger columns
NSUInteger matrices
MPSDataType dataType
NSUInteger rowBytes
NSUInteger matrixBytes
Detailed Description
This depends on Metal.framework
A MPSMatrixDescriptor describes the sizes, strides, and data type of a an array of 2-dimensional matrices. All storage is assumed to be in
'matrix-major'. See the description for MPSMatrix for further details.
Method Documentation
+ (__nonnull instancetype) matrixDescriptorWithDimensions: (NSUInteger) rows(NSUInteger) columns(NSUInteger) rowBytes(MPSDataType) dataType
Create a MPSMatrixDescriptor with the specified dimensions and data type.
Parameters:
rows The number of rows of the matrix.
columns The number of columns of the matrix.
rowBytes The number of bytes between starting elements of consecutive rows. Must be a multiple of the element size.
dataType The type of the data to be stored in the matrix.
For performance considerations the optimal row stride may not necessarily be equal to the number of columns in the matrix. The MPSMatrix
class provides a method which may be used to determine this value, see the rowBytesForColumns API in the MPSMatrix class. The number of
matrices described is initialized to 1.
+ (__nonnull instancetype) matrixDescriptorWithRows: (NSUInteger) rows(NSUInteger) columns(NSUInteger) matrices(NSUInteger)
rowBytes(NSUInteger) matrixBytes(MPSDataType) dataType
Create a MPSMatrixDescriptor with the specified dimensions and data type.
Parameters:
rows The number of rows of a single matrix.
columns The number of columns of a single matrix.
matrices The number of matrices in the MPSMatrix object.
rowBytes The number of bytes between starting elements of consecutive rows. Must be a multiple of the element size.
matrixBytes The number of bytes between starting elements of consecutive matrices. Must be a multiple of rowBytes.
dataType The type of the data to be stored in the matrix.
For performance considerations the optimal row stride may not necessarily be equal to the number of columns in the matrix. The MPSMatrix
class provides a method which may be used to determine this value, see the rowBytesForColumns API in the MPSMatrix class.
+ (__nonnull instancetype) matrixDescriptorWithRows: (NSUInteger) rows(NSUInteger) columns(NSUInteger) rowBytes(MPSDataType) dataType
+ (size_t) rowBytesForColumns: (NSUInteger) columns(MPSDataType) dataType
+ (size_t) rowBytesFromColumns: (NSUInteger) columns(MPSDataType) dataType
Return the recommended row stride, in bytes, for a given number of columns.
Parameters:
columns The number of columns in the matrix for which the recommended row stride, in bytes, is to be determined.
dataType The type of matrix data values.
To achieve best performance the optimal stride between rows of a matrix is not necessarily equivalent to the number of columns. This method
returns the row stride, in bytes, which gives best performance for a given number of columns. Using this row stride to construct your array
is recommended, but not required (provided that the stride used is still large enough to allocate a full row of data).
Property Documentation
- columns [read], [write], [nonatomic], [assign]
The number of columns in a matrix.
- dataType [read], [write], [nonatomic], [assign]
The type of the data which makes up the values of the matrix.
- matrices [read], [nonatomic], [assign]
The number of matrices.
- matrixBytes [read], [nonatomic], [assign]
The stride, in bytes, between corresponding elements of consecutive matrices. Must be a multiple of rowBytes.
- rowBytes [read], [write], [nonatomic], [assign]
The stride, in bytes, between corresponding elements of consecutive rows. Must be a multiple of the element size.
- rows [read], [write], [nonatomic], [assign]
The number of rows in a matrix.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSMatrixDescriptor(3)