I am a beginner and I want to know whats wrong with this code. I want to count the number of times the push button is being pushed in portA. Then show this values using the LEDS in portC. Thanks
You need braces around a multi-statement block, if you want to use it as the body of an if (or for or whatever) statement:
else if (PORTA.RA2==1) {
count = count+1;
PORTC = count;
}
otherwise only the first statement is conditional; so your code executes PORTC = count; every time, whatever the result of the if tests.
I like to put braces around all such blocks, even there's only a single statement, so I can't forget to add them if I add more statements later.
Also, main must return int not void, and you should take more care formatting your code to match its logical structure.
UPDATE: Also, you never initialise count, so it has an arbitrary floating-point value. You want a small integer type, since it's only supposed to take integer values from 0 to 16, and you need to initialise it:
char count = 0;
If you're setting TRISA to 1 that means the only input on that port is RA0, but you are trying to use RA2. Be sure to clear the ANSELA0 bit. Make sure you set the config bits properly or else your code might not run.
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I have a value I am trying to increment by 1 in a DynamoDB row. The first time this is executed, the parameter does not exist, so it would be set to one. However, I want it to fail if it gets up to a specific value so it can only be updated so many times.
I am using the correct Expected syntax, but I can't seem to figure out a way to allow this currently without a double update: One to update if it's not there, and one do it if it is there and below the threshold. Is this possible in a single update command?
Please note, this is not the same thing as simply wanting a value to be set to 1 or add up from there as suggested in the comments below, but instead, this single expression must handle the property being there or a number, and then continue to add up a certain threshold, and then fail and not allow an update once the threshold is met.
Ok, I believe that this is possible, but only if you switch the whole update command over to using expressions instead of using the "Expected" and "AttributeUpdates" field. This does make it much harder to use, but then you should be able to make compound conditions such as
params.ConditionExpression = 'attribute_not_exists(#A) OR #A < ' + maxValue.toString();
Final:Result after calculating and displaying the differenceI am new to VVC and I am going through the reference software's code trying to understand it. I have encoded and decoded videos using the reference software. I want to extract the bitstream from it, I want to know the number of bits there are in each macroblock. I am not sure which class I should be working with, for now I am looking at, mv.cpp, QuantRDOQ.cpp, and TrQuant.cpp.
I am afraid to mess the code up completely, I don't know where to add what lines of code. Start: Result after calculating and displaying the difference
P.S. The linked pictures are after my problem has been solved, I attached these pictures because of my query in the comments.
As the error says, getNumBins() is not supported by the CABAC estimator. So you should make sure you call it "only" during the encoding, and not during the RDO.
This should do the job:
if (isEncoding())
before = m_BinEncoder.getNumBins()
coding_unit( cu, partitioner, cuCtx );
if (isEncoding())
{
after = m_BinEncoder.getNumBins();
diff = after - before;
}
The simpleset solution that I'm aware of is at the encoder side.
The trick is to compute the difference in the number of written bits "before" and "after" encoding a Coding Unit (CU) (aka macroblock). This stuff happens in the CABACWriter.cpp file.
You should go to to coding_tree() function, where coding_unit() function is called, which is responsible for context-coding all syntax elementes in the current CU.
There, you may call the function getNumBins() twice: once before and once after coding_unit(). The difference of the two value should do the job for you.
What I'm really doing is trying to set a watchpoint on the setting or clearing of a single bit. I do that by setting a watchpoint on the word containing the bit, then making it conditional on *word & mask (for setting, or (~*word) & mask for clearing.)
The problem is that some other bit in the same word may be modified, and the condition may happen to already match. If I had the old and new values, I could set a condition of (($old ^ $new) & mask).
I looked at the python gdb.Breakpoint class, but it doesn't seem to receive this information either.
I suppose I could go crazy and set a command list that records the current value whenever the value of *word changes, and use that as $old. But half the time I'm using this, I'm actually using it through rr, so I might be going backwards.
There's no direct way to get these values in gdb; it's been a wish-list bug (with your exact case as the example...) for years.. The information is stored in the old_val field of the struct bpstats object associated with the breakpoint; but this is only used to print the old value and not exposed elsewhere.
One option might be to change gdb to expose this value via a convenience variable or via Python.
I suppose I could go crazy and set a command list that records the current value whenever the value of *word changes, and use that as $old. But half the time I'm using this, I'm actually using it through rr, so I might be going backwards.
This seems doable. Your script could check the current execution direction. The main difficulty is remembering to reset the saved value when making this watchpoint, or after disabling and then re-enabling it.
The answers in topics with similar titles haven't given me much of a resolution to my particular problem, but possibly I am not asking the right question. It might help knowing I'm an absolute noob when it comes to spreadsheets, so finding my way around is next to nil.
Currently I can set a basic function in the first cell A1 =ROW()
Simple right? Well now here comes the complication. If I click on the bottom right of the cell and start dragging I can then apply that very same function to a whole range of cells. Let's say I apply it from A1:A10. Every cell within this group now has the same function.
Hooray! We did it, right? I applied a function to a range of cells each with their own output. But wait, if I then go back to the original cell and change its formula none of the other cells change with it. GRRRRR!!!!
There are a couple of fixes I've come up with but don't necessarily know how to implement. The first is to have every cell link back to the original cell and reference its function. This would be useful if I wanted to randomly scatter dependent cells about the document. The other would be much more useful in an orderly group where you know the exact dimensions by specifying in the original cell the size of the array you want to apply the function to.
With that said, let me hear your thoughts.
The closest I've come to an answer is to use FORMULA() which returns the formula used by a cell as text. Unfortunately all answers on evaluating the text resort to scripting. How strange! I thought something like this would be common. Might as well get to scripting.
Hold on, I may have spoke too soon. An array can be made with =MUNIT(), but it's only square. Drats!
Ok... I'm hoping the zebra stripes will eventually become its own answer unless someone else beats me to it. So a simple array can be made with ={1,2;3,4} where commas separate values by column and semicolons for values by row except to generate it you have to press Control+Shift+Enter (because reasons?). I'm thinking now that I'll need to have functions that can generate lists of values based on a single function for each row, and pray that it'll work. So, back to looking. (Wow this is taking forever)
The way I was hypothesizing can't even generate a 1x1, e.g., ={ROW()} returns Err:512 which is a formula overflow.
Alright, in summary so far I've narrowed down the two options,
1) link every cell to the original formula
2) populate an array with a single formula
each with their own incomplete answer,
a) use FORMULA() to return the formula of a cell as text
b) create a hypothetical array like so ={LIST_OF_VALUES()}
These both require a strange form of the nonexistent EVALUATE() function to 'function' correctly. Isn't that fun?
Google Sheets handles case b by allowing ={ROW()}Control+Shift+Enter to generate =ArrayFormula({ROW()}). Working with the general case of any sized array being filled with a single function doesn't exist in the world of spreadsheets it seems. That's very saddening because I can't think of a much better tool for what I want to do. Copy paste it is until I need to use macros.
Depending on your specific use case, creating a user-defined function may help:
use the Basic IDE to create your function;
apply it to any cells on any sheet;
modifying the Basic code will affect all cells where the function is used.
I've elaborated the steps in an answer on superuser.
Sure, you could write some complex code to update functions, but wouldn't the easy way be just to drag it to the same range of cells the same way you did before? It should properly overwrite the existing code in there, and if it doesn't, you can just as easily delete the outdated code and drag the new code in.
Probably the best approach is to simply drag the amended formula over the range of cells (as advised by OldBunny2800). This is less error prone and easier to maintain than a custom macro.
Another option would be to use an array function. Then you only have to edit the function once, and the same edit will be automatically applied to the whole range of cells in that array function.
I’m pretty new with do loops in SAS and I know that I am trying to make this loop work like a MATLAB script. I haven’t found many helpful tips online as most of the do-loop examples are just for calculations, not actually checking to see if the row before the current one has the same value.
Here is my issue that I need to solve:
I want to look at each policy numbers below and see if the one before is the same, if it is, I want to flag it.
Policy
26X0118907
26X0375309
26X0375309
26X0527509
I would consider i=1 to be the first policy(26X0118907) and i=2 to be the second policy (26X0375309).
In this case according to the code (that doesn't work) below this increment would be flagged as ‘B’. Do you know how to properly code a situation like this?
data AF_Inforce_&thestate.;
set AF_Inforce_&thestate.;
by Rating_St;
if first.Rating_St then counter=0;
counter+1;
myloop:
do i=2 to counter;
P2(i)=Policy(i);
P1(i)=Policy(i-1);
if P1(i)=P2(i) then flag='A';
else flag='B';
end;
return;
run;
The first thing you need to learn coming from MATLAB or a similar language is that SAS is different. In particular, the DATA step is its own DO loop, looping over records.
Second, it's a bit complicated to access data accross rows. However, there are a few tricks.
Vasja showed you one (lag, which doesn't actually go to a previous record, but sort of acts like it does). dif does the same thing except it compares, so if your policynum had been numeric, Vasja's code could be rewritten as dif(policy)=0 instead of policy=lag(policy)(though this is only for numerics).
A better trick in my opinion in your case is to use by group processing. Normally this works with sorted fields, but here it doesn't matter if it's sorted: you just want to know if two consecutive rows are identical, right?
data want;
set have;
by rating_st policy notsorted;
if first.policy and last.policy then recflag='A';
else if first.rating_st then recflag='A';
else recflag='B';
run;
I don't know that I understand your rules entirely, but they're probably going to be some form of this. I put the two possibilities there, you might just want the second one (ie, you don't care if it's singular or just the first). The first would flag only singular policies.
Try looking at LAG function (it "remembers" the values of a variable in a queue)
Your code should go like this:
data AF_Inforce_&thestate.;
set AF_Inforce_&thestate.;
by Rating_St;
if first.Rating_St = 0 and Policy=LAG(Policy) then flag='A';
else flag='B';
run;