This question already has answers here:
"f" after number
(10 answers)
Closed 7 years ago.
This must be in documentation somewhere but I cannot find it. What does the .f mean when defining rectangles using CGSizeMake as in CGSizeMake(200.0f, 100.0f);?
.f means that value is float.
if you write directly 1.0 it is initialized as double.
to use less space 1.0f is better.
Related
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matplotlib/seaborn: first and last row cut in half of heatmap plot
(10 answers)
Closed 3 years ago.
sns.heatmap(metric, annot=True ,fmt='g', cmap ="Blues")
plt.title('Confusion matrix')
plt.ylabel('Actual label')
plt.xlabel('Predicted label')
I'm trying to plot my heatmap, but my numbers look very ugly!
Have you tried corr on dataset? something as follows
sns.heatmap(df.corr(),cmap='coolwarm',annot=True)
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What is the `?` is or the `:` at the equation when coding in Swift
(3 answers)
Please Help Me Intepret This Code SWIFT
(4 answers)
Closed 4 years ago.
I was reading through an article about BSP (Binary space partitioning) because I am looking to implement it into my project. I came across this line of code:
let max:Int = (splitH ? height : width) - Int(min)
Where splitH is a Boolean value and height/width are integers. What is this line doing? What calculation is it making? I have never seen anything like this in swift.
More specifically, what is this operation: (splitH ? height : width)
if splitH is true, it picks height otherwise it picks width, and then subtracts the value Int(min) from the picked value.
Its usual syntax is conditional ? statement if conditional is true : statement if conditional is false
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Rounding a number to the nearest 5 or 10 or X
(13 answers)
Closed 9 years ago.
I need to round a float to the nearest .5, for example:
1.1 = 1
1.5 = 1.5
1.6 = 1.5
1.8 = 2
and so on.
I really don't know how to do it. Any help would be greatly appreciated.
For positive numbers Multiply by 2, add 0.5, truncate, divide by 2.
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How to set arrows at the end of Core Plot axis?
(1 answer)
Closed 8 years ago.
is it possible to add an arrow on the graph like that with corePlot ?
Yes, but only on axis lines. See the Plot Gallery example app for several examples.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
UISlider how to set the initial value
I want to set the default value for my slider and start the thumb of the slider from that value only.
Any suggestions???
Thanks,
You can set the lowest potential value via the minimumValue method, the highest via the maximumValue method and the current value via the value method, all of which expect the value to be expressed as a float between 0.0 and 1.0.
See the UISlider class reference docs for more information.