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Display image as grayscale using matplotlib
...en images, this is fine, you won't see a different. But if you have narrow range of pixel value image, say the min pixel is 156 and the max pixel is 234. The gray image will looks totally wrong.
The right way to show an image in gray is
from matplotlib.colors import NoNorm
...
plt.imshow(img,cmap=...
What ports does RabbitMQ use?
...5197
set by inet_dist_listen_min/max Firewalls must permit traffic in this range to pass between clustered nodes
RabbitMQ Management console:
PORT 15672 for RabbitMQ version 3.x
PORT 55672 for RabbitMQ pre 3.x
PORT 5672 RabbitMQ main port.
For a cluster of nodes, they must be open to each othe...
How can I pad an integer with zeros on the left?
...y. I had to zero pad and display a collection of unsigned ints that could range between 1 to 3 digits. It needed to work lightning fast. I used this simple method: for( int i : data ) strData += (i > 9 ? (i > 99 ? "" : "0") : "00") + Integer.toString( i ) + "|"; That worked very rapidly (so...
What is the difference between BIT and TINYINT in MySQL?
...
TINYINT[(M)] [UNSIGNED] [ZEROFILL]
A very small integer. The signed range
is -128 to 127. The unsigned range is
0 to 255.
Additionally consider this;
BOOL, BOOLEAN
These types are synonyms for
TINYINT(1). A value of zero is
considered false. Non-zero values are
considered tru...
How to fix the aspect ratio in ggplot?
...ive the full picture, as the example provides perhaps unnatural data where range of x equals the range of y. If however the data were:
df <- data.frame(
x = runif(100, 0, 50),
y = runif(100, 0, 5))
ggplot(df, aes(x=x, y=y)) + geom_point() + coord_fixed()
then the plot would look like this:...
How to format numbers? [duplicate]
...bs/jquery/2.1.1/jquery.min.js"></script>
<input id="dp" type="range" min="0" max="5" step="1" value="2" title="number of decimal places?" />
Now the other version, without rounding.
This takes a different route and attempts to avoid mathematical calculation (as this can intro...
Does name length impact performance in Redis?
...e proposed usage pattern ... and some more to test another (for instance a range of key lengths ranging from 8 characters to ... how long would you like ... 8 kilobytes?) ... and the measure it.
share
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Does “untyped” also mean “dynamically typed” in the academic CS world?
...ipt variables are untyped, JavaScript values have types, and variables can range over any value type at runtime (i.e. 'dynamically').
In JavaScript and many other languages, values and not variables carry types. All variables can range over all types of values and may be considered "dynamically typ...
Create a Date with a set timezone without using a string representation
... Keep in mind that when using "Date" the "month"-value has a range from 0-11 (not 1-12). I kept getting a timezone-offset of 2h (while it should have been 1h) and it took me hours to find out that the reason was a wrong month.
– Select0r
Feb 28 '1...
How can I find the first occurrence of a sub-string in a python string?
...on .
This can be implemented as
def find_pos(string,word):
for i in range(len(string) - len(word)+1):
if string[i:i+len(word)] == word:
return i
return 'Not Found'
string = "the dude is a cool dude"
word = 'dude1'
print(find_pos(string,word))
# output 4
...