string,bash,concatenation , bash: How can I assemble the string: `“filename=output_0.csv”`


bash: How can I assemble the string: `“filename=output_0.csv”`

Question:

Tag: string,bash,concatenation

I am using a bash script to execute a program. The program must take the following argument. (The program is gnuplot.)

gnuplot -e "filename='output_0.csv'" 'plot.p'

I need to be able to assemble the following string: "filename='output_0.csv'"

My plan is to assemble the string STRING=filename='output_0.csv' and then do the following: gnuplot -r "$STRING" 'plot.p'. Note I left the words STRING without stackoverflow syntax style highlighting to emphasise the string I want to produce.

I'm not particularly proficient at bash, and so I have no idea how to do this.

I think that strings can be concatenated by using STRING="$STRING"stuff to append to string? I think that may be required?

As an extra layer of complication the value 0 is actually an integer which should increment by 1 each time the program is run. (Done by a for loop.) If I have n=1 in my program, how can I replace the 0 in the string by the "string value" or text version of the integer n?


Answer:

An answer was posted, which I thought I had accepted already, but for some reason it has been deleted, possibly because it didn't quite answer the question.

I posted another similar question, and the answer to that helped me also answer this question. You can find said question and answer here: bash: Execute a string as a command


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