◆ MATLAB

Check if matrix contains a specific value

This is real work, not a feature someone invented — it comes from real job ads and real questions people asked. Below are four ready AI prompts: get it done, make it easy for the next person to say yes to, work out the right move when you are stuck, and stop it coming back.

4prompts
See the prompt↓All MATLAB tasks

The same task, four prompts

today's deadline · the next reviewer · the stuck moment · the pattern
AExecute — do the immediate taskCheck if the 'temperature_readings' matrix contains the value 999 and print 'Error detected' if…+
Check if the 'temperature_readings' matrix contains the value 999 and print 'Error detected' if it does.
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
BImprove — make it easier to acceptI need to verify if the 'sensor_data_matrix' contains any NaN values. If it does, I want to log…+
I need to verify if the 'sensor_data_matrix' contains any NaN values. If it does, I want to log the number of NaN values found and their row/column indices, so I can understand the extent of the missing data before proceeding with the analysis.
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
CDecide — diagnose the stuck momentI'm trying to check if the 'large_dataset_matrix' contains the value -999, which indicates…+
I'm checking a large matrix for a specific value, but it's taking too long.
I'm trying to check if the 'large_dataset_matrix' contains the value -999, which indicates corrupted data. The current method is incredibly slow, making my pre-processing step take hours. I'm afraid I'll miss our Friday deadline for the report if this continues. I can't tell if there's a more optimized function or a different approach that can perform this check much faster, given the matrix size. What's the most likely diagnosis for the slowness, and what's the best next move to speed this up significantly?
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
DBecome — change the patternI frequently waste time and computational resources when checking large matrices for specific…+
I repeatedly struggle with efficiently checking matrices for specific values.
I frequently waste time and computational resources when checking large matrices for specific values, especially when I need more than a simple boolean result, like the count or location of the values. This often leads to inefficient code or missed errors. What habit should I change to consistently and efficiently check matrices for specific values, ensuring I get the necessary information without slowing down my entire workflow?
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?

Questions people actually ask

honest answers, no sign-up

Every task here was seen in the real world. Someone doing the job named it, a real job ad asked for it, or a lot of people asked about it online.

If nothing real showed a task, it is not on the page. That is the whole rule.

They are the same job approached four ways, because what you need depends on where you are.

Get it done today. Make it easy for the next person to say yes to. Work out the right move when you are stuck. Learn the pattern so the job stops coming back.

For most of these jobs it can carry the heavy thinking - draft it, sort it, check it, rehearse it with you.

It cannot sit in your chair, take the blame when a number is wrong, or notice what nobody wrote down. Let it do the first 80%. Keep the last 20% that is truly yours.

No. Copy any prompt and paste it into the AI you already use. No account, no score, no wall in the way.

Any of them. The prompts describe the work rather than naming a product, so they are not tied to one assistant.

That is also why they keep working when you switch.

Change it freely. Every prompt is a starting line, not a rule.

Put in your real numbers, your real names and your real deadline. The more you make it yours, the better the answer comes back.

The tasks come from real job ads, published job data and the questions people ask in public forums.

The steps come from MATLAB's own documentation, with practitioner sources for the traps the manual does not mention.

Push once. Ask it to sharpen the weakest part and to say what it assumed.

Most wrong answers come from a missing detail rather than a bad prompt - tell it the thing it could not know.