The phrase "a lack of graphical" is correct and usable in written English.
It can be used when discussing the absence or deficiency of graphical elements, such as images, charts, or visual aids in a document or presentation.
Example: "The report suffers from a lack of graphical representation, making it difficult to understand the data trends."
Alternatives: "an absence of graphical" or "a deficiency in graphical".
There is however a comparative lack of graphical methods to visualise more than one variable at multiple time points; this would be useful to help understand how individual patients progress on two or three variables simultaneously, and how each individual compares to the mean of their respective group or to all other patients.
Results demonstrated the effect of screen ratio, but a lack of an effect of graphical display on task performance and two subjective outcome measures.
Despite its visual setbacks, critics exalted the game for managing to keep a steady 60 frame/s, which some felt made up for the lack of graphical detail.
For instance the lack of graphical standards for PROforma emerges as an important issue when modelling knowledge acquired from experts because, at this stage of a project, it is necessary to be able to represent knowledge as diagrams on paper that can be read without the use of software tools.
Several examples are shown to portray the lack of graphical indicators on executable diagrams, forcing the user to manually identify illogical relationships, and rerun the simulation until it succeeds in running to completion; this is a process that can be very time consuming as a result of user error.
He also lauds the game for its diverse weaponry, lack of graphical slowdown seen in some older console games, and the superior, futuristic audio, which he says has an "optimistic quality" to it.
13 14 Tachypnoea, a common indicator of poor health, might have been described as "stable" in our study so frequently because of the relative lack of graphical emphasis given to respiratory rates on the observation charts.
A lack of entrepreneurship.
